How do I delete my facebook search history?

[Billy]

I've already done the delete search history under my account, but my recent searches still show up. I have searched a few naughty sites that would be totally embarrassing if someone saw.

I also tried using my facebook account on a different browser and the same exact searches come up, although I have not tried a different computer, is there any way to hide my searches?

Also, I've tried to hide my suspicious searches by searching other pages with similar spelling, but the search I want to remove/hide still stays at the top search.

Lastly, I read that changing the language of my account should work, it didnt.
I already tried doing the activity log and deleting searches. It says that its clear, but the searches still show up.