In a mixing bowl, toss chicken pieces with salt and tempura flour until well coated.
Heat oil for deep-frying in a deep-frying pan. Fry dried chilies for about 10 seconds. Remove with a strainer and set aside.
In the same oil, fry kaffir lime leaves for about 10 seconds. Remove and set aside.
Fry the coated chicken pieces in batches until golden and crispy. Avoid overcrowding. Let excess oil drain off on a wire rack or paper towel.
In a clean wok, heat a tablespoon of oil and sauté garlic and chili flakes until lightly golden and fragrant.
Add water, oyster sauce, light soy sauce, and palm sugar. Stir and simmer until the sauce thickens and turns sticky.
Add fried chicken, chilies, and kaffir lime leaves to the sauce. Toss everything together until evenly coated. Serve immediately with rice.