Why are thousands of people searching for this specific phrase?

: You might ask a shared contact for information, or look for posts on public pages or groups where the person may have commented. External Search

A Facebook locked profile is a profile that has been set to private by the owner. This means that only people who have been approved by the owner can view their profile, photos, and posts. When you try to view a locked profile, you'll typically see a message saying that the profile is not available or that you've been asked to request access.

: This is the only official way to gain access to a locked profile's private content.