I see that my game https://anton-archangel.itch.io/cybernoxium-drive can be found in the search by using the name but not found by using keywords such as "car, cyber, drifting" . . . 

Yes, that's right. As explained in lots and lots of topics, the free-form search is optimized for exact title matches. For tags you can use the other search box below. See Limitations of Search.