How should I use the খুঁজুন function?

I've been on here for 3 years now, and I still can't make heads অথবা tails from the খুঁজুন function! I mean, whenever I use three খুঁজুন tags, it tells me that it cannot find the thing I'm looking for. অথবা should I maybe just not use the খুঁজুন function? Anyone help me. Please. I'm so desperate.

I'm gonna die if I don't know. D}: