You can review your all-time Facebook activities from your activity log page and you can delete your search histories as well from the page. If you don’t know how to delete search history, just follow as described below.

– Log in to Facebook and go to your profile by clicking on the profile button or profile name. Then, click on the “Activity log” tab (see screenshot above).

– On the activity log page, click on the “Post and Apps” option. From the drop-down list, choose the search option.

– On the search option page, you will see a “clear searches” button. Just click on it to clear the search history. You’re done!