Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for refining search results. In one aspect, a method includes presenting search results that are responsive to a search query on a search engine results page and each search result includes a snippet. The method also include receiving a refinement to the search query through the search engine results page and generating a request to update one or more of the snippets based on the refinement. The method also includes receiving one or more updated snippets in response to the request and updating one or more of the search results presented on the search engine results page using the one or more updated snippets.