Notes Filter is not working

Notes Filter is not working

I am trying to filter the CRM down to specific notes that I want that'll show up all the data that has a specific keyword for example, "stocks" and it says no leads are found... Don't know how to fix. don't know if it's a system glitch. I even put a note with the key word in it to see if it'll find it but popped up with nothing.
Is there a fix or no?