1. A system, comprising: a display; and a processor programmed to: receive multiple partial-image selections that each comprises a user-selected portion of one of a plurality of images; derive partial-image search criteria from a combination of the multiple partial-image selections; perform a search for images that correspond to the partial-image search criteria derived from the combination of the multiple partial-image selections; and return, via the display, 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.