A method, system, and apparatus are directed to providing information over a network. A search query may be received. If the search query includes at least one keyword matching a pattern associated with a specific search engine, a plurality of search results is retrieved from the specific search engine based on the keyword, and the plurality of search results is provided. A plurality of potential search or source engines may be determined based on a current time information. At least one of the potential search or source engines may be a personalized source engine. At least one plurality of results may be retrieved from at least one of the potential search or source engines. The result may be based on the search query. An aggregated result may be determined based on a time rule and/or the current time information. The aggregated result may comprise the plurality of results.