1. A computer-implemented method comprising: receiving a search query; obtaining one or more search results responsive to the search query, wherein a first search result of the one or more search results identifies a resource including text; computing a respective similarity measure between the search query and each of a plurality of contiguous portions of text of the resource; selecting a suggested query phrase from a first contiguous portion of text of the resource having a highest computed similarity measure with the search query; generating a first search result snippet to be presented as part of the first search result in a presentation of the one or more search results, wherein the first search result snippet presented as part of the first search result includes the suggested query phrase as a selectable user interface element for a user to submit the suggested query phrase as a new search query; and providing the presentation of the one or more search results, including the first search result snippet as part of the first search result, in response to the search query.
1. A computer-implemented method comprising: receiving a search query; obtaining one or more search results responsive to the search query, wherein a first search result of the one or more search results identifies a resource including text; computing a respective similarity measure between the search query and each of a plurality of contiguous portions of text of the resource; selecting a suggested query phrase from a first contiguous portion of text of the resource having a highest computed similarity measure with the search query; generating a first search result snippet to be presented as part of the first search result in a presentation of the one or more search results, wherein the first search result snippet presented as part of the first search result includes the suggested query phrase as a selectable user interface element for a user to submit the suggested query phrase as a new search query; and providing the presentation of the one or more search results, including the first search result snippet as part of the first search result, in response to the search query. 10. The method of claim 1 , in which the resource is a PDF document, an HTML document, an XML document, a word processing document, or a plain text document.