Reason why basic search or advance search is not working on a new custom module?

Question

Is there anything I need to check or configure to make sure that the search will work? By search I am not referring to global search but instead on the basic and advance search for the module.

Rodolfo Tuble · Accepted Answer

Nevermind I found the culprit it was a custom where added on view.list.php, I had to check every file for the module and found it. I just assumed no one touched the code. Thanks for all your tips everyone.