The latest version of Mastodon (4.2.0) brings full text search, so you can search by words instead of hashtags.

However, for privacy reasons this only includes posts by people who have actively opted into full text search.

If your server is updated to 4.2.0 and you want to opt into full text search:

1. Log into your server's website
2. Click your profile icon
3. Click "Edit Profile"
4. Click tab "Privacy & Reach"
5. Tick box "Include Public Posts In Search results"
6. Click "Save Changes"

@feditips Going forward, if you create a new account on a server/instance that is 4.2.0+, will the new account have this option on or off by default?

@FalconMarkSix

As far as I know, the option is always off by default. It is opt-in, i.e. you have to personally opt in if you want it to work.