The best wide flat rice noodles for stir frying is ho fun noodles (河粉). There are specific ones for frying and should have the Chinese character “fried” (炒) on the label. These ones are generally wider and thicker than pho noodles. They are also stretchier so they can handle more tossing and flipping. Fresh noodles are ideal because they are more chewy and have a bit of oil mixed in for easier frying. You can buy dried rice noodles and blanche them, but will tend to break apart more easily during frying.