Breed doesn't matter in training. A good "come" command is essential dog training. Leave your dog on a long lead and after it walks away a few steps tell it "come" and get excited. After your dog comes back to you praise it. After you do that a few times let the dog get further and further away but make sure it comes back every time. Having a long 20' lead is essential, never let the dog out of your control while you are teaching this command.
Work on that every day for a few weeks and then start adding distractions like other people at a park. then work progressively with more and more distractions until your dog comes back every single time. It is important to have a strong bond with the dog so that it want to come back to you. Don't scold the dog and take away its drive to be with you during this exercise.