Facebook provides testing capability to search anything with post
 

Facebook added the ability to search within public posts, boosting the social network’s utility as a source of real-time information.But it’s still not easy to find a specific post on the social network, which is no surprise considering Facebook says that it has more than 2 trillion posts to sift through. To make it easier to find posts from a single source, Facebook is testing a new feature to enable searching within a Page.

Facebook comes with new feature that enables users to search within which that makes anything you ever posted publicly easily searchable