Is it best to have many short sources, one long source, or something in between?

I am trying to make a searchable database of songs where I can ask it for suggestions based on theme and lyrical content. I have over 170 songs, so, on my pro account, I made one with a separate source per song with the lyrics and some basic info. I found that that didn't search super well. So, then I made a single Google Doc with all the songs in one source, but I also felt like that was missing things. Which direction is the best way to go, or should I build something in between and make 4-5 documents made up of chunks of the alphabet in song titles?

TLDR: What would be the best way to make a searchable notebook of 170+ songs? 170+ sources (one per song), one document with all the songs, or the info spread across a few sources?