Your game is indexed, otherwise it wouldn't appear in any searches, so I don't see any errors or anything you can do.
It is simply the way in which the algorithm is programmed, there are no public details of how it works, except that it is optimized to search for complete titles and not partial titles, hence it does not behave as you expect.
Even so, if you think there is an error, you should talk to support or the admin, who are the only ones who have access to review the search algorithm.