Easiest and laziest way short of straight up cheating is to get as many scouts as you can then wait for a regen day. Once said regen day is around go to the world youth intake, select said month and country highlight and get scout report.
You'll need a lot of scouts because you'll be getting through a few hundred players at a time.
The best way though is to manually look at each one, offer a contract to any that initially look decent and then wait for the scout report to come in before you decide to cancel or complete the deal.