I understand.
Yes, as I stated in my original comment, I did a search, but I had also scrolled through one of the notebooks high & low & couldn't find 2 of the notes.
I think I know which notebook the 3rd note was in, but again, it's not there.
Interestingly when I just started a deep search on my computer, it found one of the kws in C/Users/MyName/Evernote/Databases
I've been having issues with Evernote for several months & have complained about it over & over again that I'll be in the middle of typing up a note & POOF, it disappears & I get a blank white screen & have to click on it on the left side.
This happens also if I leave the note & come back to it.
I'll bet you that bug is deleting notes. sigh