1. A method for providing deep content search results by indexing referenced content, comprising: evaluating parent content to identify a reference contained in the parent content, wherein the reference comprises a link to the referenced content, and wherein the referenced content is external to the parent content and is hosted by a content source; acquiring the referenced content from the content source using the reference; evaluating the referenced content to determine a search term that is descriptive of the referenced content; indexing the referenced content with the parent content into a search index using the search term, wherein indexing the referenced content with the parent content makes the external referenced content accessible to a search function directed to the parent content; receiving a search query; and evaluating the search index using the search query, comprising: responsive to the search query corresponding to the search term, providing at least the referenced content as a search result for the search query.