Only thing I've found on a boolean search method was
but it was more of a feature request. When looking at the help file, it said EN advanced search was "powerful". Ehh.
I guess a basic boolean search feature hasn't been implemented yet. So another +1 for this. Hopefully it comes out with the ability to use regex as well.
While we're requesting some features, I'd also like to suggest a way to fully close the gap in the differences between the Windows version and the Mac version.
Mac version seems way less advanced (no auto tagging, colored styles in sidebar