Systems and methods for aggregating search results are disclosed herein. The systems and methods include receiving a user search query, analyzing the user search query to identify a plurality of properties of the user search query, identifying a plurality of search results that match the user search query, each search result being based on a different scheme, and aggregating the search results to produce a search results list. The search results list may be a combined and selected results list. Feedback-based optimization is also disclosed.