Lost my ability to edit, but here's a link to Albert:
https://albertlauncher.github.io/
The demonstrations there confirm searching... and way more than I can do justice here
The demonstrations there confirm searching... and way more than I can do justice here
I also catfish https://launchpad.net/catfish-search which is excellent. Also can search within text files.
I install it through the Fedora repositories and only use the bundled extensions, so I don't worry too much about it