Search method and device, server and computer readable storage medium

The invention discloses a search method, device and system, a server and a computer readable storage medium, and the method comprises the steps: obtaining a search statement, and determining all search words in the search statement; determining a necessary result of each search term according to the term information of each search term, wherein the required result is that the search term is a required search term or a non-required search term; generating a search keyword based on the necessary result of each search term, and performing search by utilizing the search keyword to obtain a searchresult corresponding to the search statement, wherein the search keyword comprises one or more search terms and at least comprises one necessary search term; sorting the search results based on the importance of each necessary search term, wherein the sorting priority of the search results corresponding to the search keywords is in positive correlation with the sum of the importance degrees of allthe necessary search word