A method includes receiving a query that that is unstructured for a plurality databases; receiving data identifying resources that are determined to be responsive to the query, each resource associated with a search score that defines a respective position of the resource in an order of responsiveness to the query; determining, a service requirement from the terms of the query; determining, for each of the databases, a service requirement score for the database; for each resource that is associated with one of the databases, adjusting the search score based on the service requirement score for the database; generating search results, each search result identify a corresponding resource that was determined to be responsive to the query, and the search results being ordered according to the respective search scores and adjusted search scores of the resources.