1. A method, comprising: receiving, by a processor, multiple partial-image selections that each comprises a user-selected portion of one of a plurality of images; deriving partial-image search criteria from a combination of the multiple partial-image selections; performing a search for images that correspond to the partial-image search criteria derived from the combination of the multiple partial-image selections; and returning visual search results that comprise at least one identified image that comprises features that correspond to the partial-image search criteria derived from the combination of the multiple partial-image selections.