The technical problem of reducing the amount of processing involved when searching for customizable media content items that are suitable for incorporating input text is addressed by providing a hybrid search system. In some examples, the hybrid search system executes a rough search first, to determine whether a line of text can be incorporated into a media content item, based on character count conditions associated with the media content item. A more thorough evaluation of the input text with respect to the media content item is executed subsequent to the rough search if the rough search produces a result indicating uncertainty with respect to whether the combination of specific characters included in the input text can or cannot be incorporated into the media content item.