Search for file names by using the file: operator. And please search before posting new issues, this has been discussed repeatedly recently.
@AlexanderSavenkov It’s not that it’s a “feature,” but it’s the way it currently works. Keep in mind that Obsidian is still in Beta. Search might continue to evolve.
To wit, please add likes/replies to the feature request on changing this behaviour if you want it to change: Make default search function look in all fields - filename, content, tags, etc