In addition to the persistent search bar at the top of every page, many lists offer a search box or filters to narrow down the records listed on the page.
These on-page options either use a single index or a small number of indices you choose in a drop-down menu. The options will change depending on the list you're searching.
The Manage Sets page has both a search box and filters.
In the search box, you can search by the set Name or who it was created by (if you were searching Public Sets).
In the filters, you can choose from the drop-down options to limit the list by Content Type or Content Origin.
