In a medium-sized bowl, combine the soy sauce, chicken broth, dark soy sauce, oyster sauce, hoisin sauce, sesame oil, and sugar. Set aside.
Bring a large pot of salted water to a boil. Have this ready for when it's time to cook the noodles.
Add the oil to a wok or large skillet set over high heat. Add the chicken, and stir fry for 5-7 minutes. Remove the chicken from the pan to a clean plate. Set aside.
Return the same work or skillet to medium-high heat, add the onion and red bell pepper, and sauté for 2-3 minutes, stirring often.
Mix in the carrots, snow peas, garlic, ginger, and stir-fry for 3-4 minutes until the vegetables are crisp yet tender.
Cook the noodles until al dente according to package instructions. Drain.
Return the chicken to the wok and add the sauce. Mix well to coat and cook for 2-3 minutes or until heated through.
Add the noodles to the pan and toss gently until well coated in the sauce.
Garnish with chopped green onions/scallions or sesame seeds if desired.