I do have a file with a file name including that that (the path being "/Users/Mari/Documents/egenmelding.txt"), and even if I just type "e" or any other single letter, which I obviously have a lot of files matching, it defaults back to a web search:
These are my Default Results prefs. As I understand it, regardless of these settings, when I use "open" or "find" it should search my whole Home folder?
I'll try to rebuild the index, because as far as I know, I haven't changed any of these settings in years, and it used to work fine. As it is now, no search terms at all work with open/find/in.