Bring water to a boil in a large pot. turn the heat off and add the noodles. Let them soak until softened, 1-3 minutes. Drain the noodles and rinse them with cold water. Place them in a large bowl.
Whisk together the fish sauce, sugar, lime juice, chile and garlic in a small bowl.
Add the chicken to the noodles, along with the carrots, bean sprouts, onions, cilantro, mint, basil and peanuts. Add the dressing and toss well.
Garnish with extra peanuts, bean sprouts, and basil leaves if desired.