Methods, apparatus, and computer readable media related to determining that no resources responsive to a query of a user at a first time satisfy one or more criteria (e.g., one or more quality criteria) and, in response to such a determination: providing for presentation to the user at a later time, content that is based on a given resource that is responsive to the query at the later time and that satisfies the criteria. The given resource that is responsive to the query at the later time may be a resource that is in addition to any resources responsive to the query at the first time or may be a refined version of a resource that was responsive to the query at the first time.