I'd be grateful for instruction on how to use search (presumably Boolean search) to solve a problem like the following example:
I have parent tag 'x' with a note count of 10. All 10 are in the same notebook.
This tag 'x' has 3 child tags each with a note count as follows:
child tag: 'xa' (3)
child tag: 'xb' (3)
child tag: 'xc' (3)
To all nine notes have the parent tag 'x' applied to them as well.
So one tag with 'x' does not have this and 'xa', or this and 'xb', or this and 'cx'.
Now I need to determine which of the ten notes that were tagged with 'x' it is that does not have one or other of those three child tags applied to it.
For that expample involving few notes I can of course identify the odd note out by checking each one individually, but I've failed with every attempted formula for getting Evernote to do the work.
Surely there's a way...?