diff --git a/src/components/chat-view/Chat.tsx b/src/components/chat-view/Chat.tsx
index d4e5233..4d62074 100644
--- a/src/components/chat-view/Chat.tsx
+++ b/src/components/chat-view/Chat.tsx
@@ -535,7 +535,7 @@ const Chat = forwardRef<ChatRef, ChatProps>((props, ref) => {
 						}
 					}
 				} else if (toolArgs.type === 'search_web') {
-					const results = await webSearch(toolArgs.query, settings.serperApiKey)
+					const results = await webSearch(toolArgs.query, settings.serperApiKey, settings.jinaApiKey, (await getRAGEngine()))
 					const formattedContent = `[search_web for '${toolArgs.query}'] Result:\n${results}\n`;
 					return {
 						type: 'search_web',
diff --git a/src/core/rag/rag-engine.ts b/src/core/rag/rag-engine.ts
index 1e0d48a..5cee91d 100644
--- a/src/core/rag/rag-engine.ts
+++ b/src/core/rag/rag-engine.ts
@@ -97,7 +97,7 @@ export class RAGEngine {
 		if (!this.initialized) {
       await this.updateVaultIndex({ reindexAll: false }, onQueryProgressChange)
     }
-    const queryEmbedding = await this.getQueryEmbedding(query)
+    const queryEmbedding = await this.getEmbedding(query)
     onQueryProgressChange?.({
       type: 'querying',
 		})
@@ -123,7 +123,7 @@ export class RAGEngine {
     return queryResult
   }
 
-  private async getQueryEmbedding(query: string): Promise<number[]> {
+  async getEmbedding(query: string): Promise<number[]> {
     if (!this.embeddingModel) {
       throw new Error('Embedding model is not set')
     }
diff --git a/src/utils/web-search.ts b/src/utils/web-search.ts
index 6928831..cfe0146 100644
--- a/src/utils/web-search.ts
+++ b/src/utils/web-search.ts
@@ -3,20 +3,33 @@ import https from 'https';
 import { htmlToMarkdown, requestUrl } from 'obsidian';
 
 import { JINA_BASE_URL, SERPER_BASE_URL } from '../constants';
+import { RAGEngine } from '../core/rag/rag-engine';
 
 import { YoutubeTranscript, isYoutubeUrl } from './youtube-transcript';
 
+
 interface SearchResult {
 	title: string;
 	link: string;
 	snippet: string;
+	snippet_embedding: number[];
+	content?: string;
 }
 
 interface SearchResponse {
 	organic_results?: SearchResult[];
 }
 
-export async function webSearch(query: string, serperApiKey: string): Promise<string> {
+// 添加余弦相似度计算函数
+function cosineSimilarity(vecA: number[], vecB: number[]): number {
+	const dotProduct = vecA.reduce((sum, a, i) => sum + a * vecB[i], 0);
+	const magnitudeA = Math.sqrt(vecA.reduce((sum, a) => sum + a * a, 0));
+	const magnitudeB = Math.sqrt(vecB.reduce((sum, b) => sum + b * b, 0));
+
+	return dotProduct / (magnitudeA * magnitudeB);
+}
+
+async function serperSearch(query: string, serperApiKey: string): Promise<SearchResult[]> {
 	return new Promise((resolve, reject) => {
 		const url = `${SERPER_BASE_URL}?q=${encodeURIComponent(query)}&engine=google&api_key=${serperApiKey}&num=20`;
 
@@ -38,15 +51,17 @@ export async function webSearch(query: string, serperApiKey: string): Promise<st
 					const results = parsedData?.organic_results;
 
 					if (!results) {
-						resolve('');
+						resolve([]);
 						return;
 					}
 
-					const formattedResults = results.map((item: SearchResult) => {
-						return `title: ${item.title}\nurl: ${item.link}\nsnippet: ${item.snippet}\n`;
-					}).join('\n\n');
+					resolve(results);
 
-					resolve(formattedResults);
+					// const formattedResults = results.map((item: SearchResult) => {
+					// 	return `title: ${item.title}\nurl: ${item.link}\nsnippet: ${item.snippet}\n`;
+					// }).join('\n\n');
+
+					// resolve(formattedResults);
 				} catch (error) {
 					reject(error);
 				}
@@ -57,7 +72,40 @@ export async function webSearch(query: string, serperApiKey: string): Promise<st
 	});
 }
 
-async function getWebsiteContent(url: string): Promise<string> {
+async function filterByEmbedding(query: string, results: SearchResult[], ragEngine: RAGEngine): Promise<SearchResult[]> {
+
+	// 如果没有结果，直接返回空数组
+	if (results.length === 0) {
+		return [];
+	}
+
+	// 获取查询的嵌入向量
+	const queryEmbedding = await ragEngine.getEmbedding(query);
+
+	// 并行处理所有结果的嵌入向量计算
+	const processedResults = await Promise.all(
+		results.map(async (result) => {
+			const resultEmbedding = await ragEngine.getEmbedding(result.snippet);
+			const similarity = cosineSimilarity(queryEmbedding, resultEmbedding);
+
+			return {
+				...result,
+				similarity,
+				snippet_embedding: resultEmbedding
+			};
+		})
+	);
+
+	// 根据相似度过滤和排序结果
+	const filteredResults = processedResults
+		.filter(result => result.similarity > 0.5)
+		.sort((a, b) => b.similarity - a.similarity)
+		.slice(0, 5);
+
+	return filteredResults;
+}
+
+async function fetchByLocalTool(url: string): Promise<string> {
 	if (isYoutubeUrl(url)) {
 		// TODO: pass language based on user preferences
 		const { title, transcript } =
@@ -73,30 +121,7 @@ ${transcript.map((t) => `${t.offset}: ${t.text}`).join('\n')}`
 	return htmlToMarkdown(response.text)
 }
 
-
-export async function fetchUrlsContent(urls: string[], apiKey: string): Promise<string> {
-	const use_jina = apiKey && apiKey != '' ? true : false
-	return new Promise((resolve) => {
-		const results = urls.map(async (url) => {
-			try {
-				const content = use_jina ? await fetchJina(url, apiKey) : await getWebsiteContent(url);
-				return `<url_content url="${url}">\n${content}\n</url_content>`;
-			} catch (error) {
-				console.error(`Failed to fetch URL content: ${url}`, error);
-				return `<url_content url="${url}">\n fetch content error: ${error}\n</url_content>`;
-			}
-		});
-
-		Promise.all(results).then((texts) => {
-			resolve(texts.join('\n\n'));
-		}).catch((error) => {
-			console.error('fetch urls content error', error);
-			resolve('fetch urls content error'); // even if error, return some content
-		});
-	});
-}
-
-function fetchJina(url: string, apiKey: string): Promise<string> {
+async function fetchByJina(url: string, apiKey: string): Promise<string> {
 	return new Promise((resolve) => {
 		const jinaUrl = `${JINA_BASE_URL}/${url}`;
 
@@ -141,4 +166,68 @@ function fetchJina(url: string, apiKey: string): Promise<string> {
 
 		req.end();
 	});
-}
\ No newline at end of file
+}
+
+export async function fetchUrlContent(url: string, apiKey: string): Promise<string | null> {
+	try {
+		if (isYoutubeUrl(url)) {
+			return await fetchByLocalTool(url);
+		}
+		let content: string | null = null;
+		const validJinaKey = apiKey && apiKey !== '';
+		if (validJinaKey) {
+			try {
+				content = await fetchByJina(url, apiKey);
+			} catch (error) {
+				console.error(`Failed to fetch URL by jina: ${url}`, error);
+				content = await fetchByLocalTool(url);
+			}
+		} else {
+			content = await fetchByLocalTool(url);
+		}
+		return content.replaceAll(/\n{2,}/g, '\n');
+	} catch (error) {
+		console.error(`Failed to fetch URL content: ${url}`, error);
+		return null;
+	}
+}
+
+export async function webSearch(query: string, serperApiKey: string, jinaApiKey: string, ragEngine: RAGEngine): Promise<string> {
+	try {
+		const results = await serperSearch(query, serperApiKey);
+		const filteredResults = await filterByEmbedding(query, results, ragEngine);
+		const filteredResultsWithContent = await Promise.all(filteredResults.map(async (result) => {
+			let content = await fetchUrlContent(result.link, jinaApiKey);
+			if (content.length === 0) {
+				content = result.snippet;
+			}
+			return `<url_content url="${result.link}">\n${content}\n</url_content>`;
+		}));
+		return filteredResultsWithContent.join('\n\n');
+	} catch (error) {
+		console.error(`Failed to web search: ${query}`, error);
+		return "web search error";
+	}
+}
+
+// todo: update 
+export async function fetchUrlsContent(urls: string[], apiKey: string): Promise<string> {
+	return new Promise((resolve) => {
+		const results = urls.map(async (url) => {
+			try {
+				const content = await fetchUrlContent(url, apiKey);
+				return `<url_content url="${url}">\n${content}\n</url_content>`;
+			} catch (error) {
+				console.error(`Failed to fetch URL content: ${url}`, error);
+				return `<url_content url="${url}">\n fetch content error: ${error}\n</url_content>`;
+			}
+		});
+
+		Promise.all(results).then((texts) => {
+			resolve(texts.join('\n\n'));
+		}).catch((error) => {
+			console.error('fetch urls content error', error);
+			resolve('fetch urls content error'); // even if error, return some content
+		});
+	});
+}