I just wouldn’t cope with not knowing how to make some version of this soup. I love it. You can add a few mushrooms, a couple of fresh spinach leaves or some slices of zucchini (courgettes) in with the chicken. Also wonderful instead of the chicken is to cook some large, shelled prawns (shrimp) on a barbecue or griddle pan and toss them into the soup just before serving. The fish sauce is the salt in this soup so adjust the quantities according to your taste (and the same with the chilli).