The present inventors devised, among other things, systems, methods, and software for enhancing the relevancy of content presented to users in response to queries in an online information retrieval system. One exemplary system refines a user input query by making suggestions of alternatives queries. A switchboard module converts the refined query, administers one or more searches, and collects search results from one or more search engines based on the refined query. And, a post-processor module refines the collected search results by, for example, modifying the order of the results, removing inappropriate or undesirable content from the results, and/or applying historical performance analysis, based for example on social feedback.