+1 for Boolean search, but losing hope a bit. Looking at the five years of this request, it doesn't look like the desktop clients or core search/filtering functionality are still being developed much anymore. Probably a mobile-first strategy.
Just for reference, I would like to search for the following, in order to view all notes that I have tagged as ongoing, or that are due today or previously, but have not been marked done.
tag:ongoing OR (reminderOrder:* AND reminderTime:year-10 AND -reminderTime:day+1 AND -reminderDoneTime:*)