If you would like to go back to a previous contact search on the People Search page quickly, click on the Recent Searches tab.

Click on the Recent Searches title (if the pane beneath is closed).

You can then detect the relevant search you would like to recover by the date and time of the search you conducted.

In case you want to view all of the filters included in that search, click on the small arrow in the relevant search box to expand the view.

After you selected the relevant search you want to get back to, click on Search.

You will be directed to the People Search page with all of the filters applied.