1. A computer-implemented method, comprising: receiving, by a computing system, a query that was defined by user input at a computing device; identifying, by the computing system, documents that are responsive to the received query, wherein the documents that are responsive to the received query include a particular document; identifying, by the computing system, that the particular document matches another document; identifying, by the computing system, information that reflects a ranking of the another document as a result for one or more queries; determining, by the computing system and in response to having identified the information that reflects the ranking of the another document as the result for the one or more queries, a score to assign to the particular document using the information that reflects the ranking of the another document as the result for the one or more queries, wherein the computing system has determined a score to assign to each of the documents that are responsive to the received query; ranking, by the computing system and in response to having received the query, each of the documents that are responsive to the received query using the scores that have been assigned to the documents that are responsive to the received query, including the determined score that was assigned to the particular document, to generate a ranking of the documents that are responsive to the received query; and providing, by the computing system and in response to having received the query, information for receipt by the computing device so as to cause the computing device to present a display of search results that identify the documents that are responsive to the received query and that are presented in an order that is defined by the generated ranking.