I am building a dating website. It's built on a wordpress

Hi,
I am building a dating website. It's built on a wordpress theme called sweetdate4u, the profiles are integrated with buddypress. We have a lot of profiles, but unfortunately the search feature doesn't work. I don't know if there is a way to optimize the database, or if there is something missing in the database that is making the profiles not show in the search. Is there a way to make this faster? I am happy to provide any information you need to help with this issue. Thanks,

-Brian