Sbuu

Easy-search - https://github.com/BlueInt32/easy-search

TUI based interface to search in your files very quickly. I created it from the need to have an equivalent of voidtool's Everything on Linux. It's a bit different though because it's keyboard based. You define zones where you search for files most of the time, and you can manage previous files history. Then there are actions you can perform on each file/folder.

In my opinion, those wrong characters are probably coming from some OCR software used on badly scanned books. Those "several students" probably all used the same text database which has this particular issue.