How do you breed dogs to enhance the physical traits?

There is no way to "make" the puppies look more or less like either parent - only genetics can decide what the puppies will look like. It can take at least several weeks for puppies to develop their characteristics and personality. In the cases of cross-breeds, there really is no way of knowing. Some pups may look more like their mother, some will take after the father more, or they may be a complete mix of the two.