If your search returns too many results, you can filter them by space, contributors, content type, and more. Just tap ⏎ to go to advanced search.

Confluence  doesn’t actually support using leading wildcards for searching, only trailing.

So searching on *amaha wont find Yamaha…. But searching on yamah* will find Yamaha.
There is a workaround however if you use /.*amaha.*/  it will find Yamaha.

https://www.atlassian.com/software/confluence/guides/get-started/navigate#site-navigation