A system for support and management of search for documents is presented. The system includes a knowledge-database, query interface and communication to a database of documents to be searched. Information generated during a search session is collected by the system and is added to the knowledge-database. The information is ranked automatically according to the usage of that information by the user. During successive search session or during a search made by another user, the system uses the knowledge-database to support the users with keywords, queries and reference documents.