With the explosive growth of the World Wide Web, it is difficult for a user to locate information that is relevant to his need. One of the services on the Internet usually used is search engine. Through search engines, we can get information quickly. Furthermore, the search engine is also a learning tool, students use the Internet as a primary source to look for more information. In WWW world, too much information is a problem; therefore, searching information on the web became a time-consuming task. The authors briefly describe their association rule-based immediately dynamic demand matching search system which leads to improved searching efficiency and document ranking.