Scout where they are traveling and try to be there when they come towards you.
If you cannot get in front of them,breaking them up is a great option. Try to make them go in different directions, this makes it easier to call them back.
Use the Kee Kee Run or Kee Kee to call them back. You can also use a lost hen yelp or an assembly yelp.
After the break up, setup where it occurred and wait a while before calling. Face in the direction most of the birds went, but remember they could show up anywhere!