Abstract: A searching system may include a primary server with interfaces for communication with databases or with underlying search engines. The primary server may be adapted to receive a search query from a client under instructions from a user; and retrieve search results and transmit the results as a response to the client. The primary server may be adapted to store search data sets of relevant results for queries by users who are member of the set. The primary server may be adapted to select a search data set of which the user for the query is a member, and to use said search data set in providing the response to the query. The primary server may be adapted to download data concerning the selected search data set to the user. The primary server may be adapted to automatically update the search data set according to the results selected by the user.