Currently filters look for all text and tags within notes that require 100% matching in order to display relevant results.
So if I am looking for notes with tags: writings, musings, journal, etc., it will currently look for notes with all three tags instead of looking for all notes with any of those tags.
Providing a way to toggle OR (instead of AND) functionality would help immensely.
I have emailed this feature request, but figured that it would be better to discuss it here to see whatever everyone else thought about the feature.
Cheers.