I tend to get different search results for different nostr clients. The pull the data from varying sources (aka "relays") and sometimes the sources are not all connected. It's frustrating, but it's getting better and better.

So searching from a variety of clients improves your odds of finding something.

Here are some clients I use:

https://primal.net

https://iris.to

https://snort.social

https://coracle.social