Heat the oil in a wok.
Add the garlic and stir-fry until golden brown. Add the dried shrimp and salted radish, and stir a few times. Add the pork and whole shrimp and keep stirring until the shrimp turns pink. Remove the shrimp to prevent overcooking and set aside.
Add the noodles. They will stick together, so stir quickly and try to separate them. Add the water, stirring until it is absorbed, then add the pad Thai sauce and keep stirring until everything is thoroughly mixed. The noodles should appear soft and moist. If they look hard, add more cold water and stir again. Return the cooked shrimp to the wok.
Push the contents of the wok up around the sides to make room to fry the eggs. If the pan is very dry, add 1 more tablespoon of oil. Add the eggs and spread the noodles over the eggs to cover. When the eggs are cooked, stir the noodles until everything is well mixed—this should result in cooked bits of egg, both whites and yolks, dispersed throughout the noodle mixture.
Add the chiles, peanuts, garlic chives or scallions, and 1 1/2 cups bean sprouts. Mix well, spoon portions onto two individual serving dishes, garnish with the remaining bean sprouts and lime quarters, and serve.