A system may obtain search results associated with a search performed using a search query. The system may modify the search results, if necessary, based at least in part on information associated with prior document accesses by a user and present the modified search results to the user. The modification of the search results might including adding, deleting, and/or reordering items in the search results. One or more advertisements relevant to the search query may also be presented to the user along with the modified search results.