I have been running into an issue where the search results being very limited and not able to go in as deep as it could, especially in places like the RPG with over 20,000 entries.
 
To fix the problem, I went into the forum software and increased the search buffer from 150 entries to 500 entries. As expected, searches takes longer as it has to look into each entry and put what it finds into the buffer. But I think the delay, being about 1 to 2 minutes depending on the search criteria, is worth it. I'm thinking of possibly increasing it to 1000 entries but that would make the delay almost 3 to 5 minutes, I'll leave it at 500 for now.
 
Everything in the forum is as it is; no other changes done.
 
Enjoy.