A system and method for searching databases is disclosed herein. A database system may comprise a first database cluster H and a second database cluster L. After receiving a search request from a requester, the search request is executed in the first database cluster H to retrieve a first set of results. If the first set of results is greater than a minimum number of results, then the first set of results are presented to the requester. Otherwise, the second database cluster L is searched to retrieve a second set of results. Then the first set of results and the second set of results are presented to the requester. The first database cluster H is stored on a first database server; and the second database cluster L is stored on a second database server apart from the first database server. Other embodiments are also disclosed herein.