It is as simple as using the "Search" !!!!!!!!!!!
Let's say you are searching for "Wildcat Blues" by Hugo Strasser.....
I would start by searching for "Wildcat" first.
If no joy and you know the artist, I would search by "attachments/filter by/Hugo Strasser"
Don't forget to check sty, or pdf, or mid, or ?
Learn the art of searching and it will reward you