1. A method, comprising: determining, by at least one of one or more server devices, preferences of a user or a group of users, wherein the preferences indicate a document bias set and weights assigned to the documents, wherein the weights include distrusted document weights; determining, by the at least one of the one or more server devices, a high quality document set obtained from a document ranking algorithm; creating, by at least one of the one or more server devices, an intersection set of documents which includes documents in both the document bias set and the high quality document set; receiving, by at least one of the one or more server devices, a search query from the user; performing, by at least one of the one or more server devices, a search of a corpus of documents, based on the search query, to form a ranked set of search result documents; determining, by at least one of the one or more server devices, at least one link from the intersection set of documents to at least one document in the ranked set of search result documents, the at least one document not in the intersection set of documents; re-ranking, by at least one of the one or more server devices, the set of search result documents based on the preferences of the user or the group of users, wherein re-ranking the set of search results comprises: identifying a link of the set of links from the intersection set of documents to the document of the set of search result documents, and based on identifying the link, adjusting a rank of the search result document based on the weight assigned to the document in the document bias set from where the identified link originated from; and providing, by at least one of the one or more server devices, the re-ranked search results to the user.