Cook the egg noodles according to the package instructions. Drain and set aside.
In a small bowl, mix together the soy sauce, oyster sauce, hoisin sauce, and sesame oil. Set aside.
Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat.
Add the sliced chicken and cook until it is no longer pink. Remove the chicken from the skillet and set aside.
In the same skillet, add the remaining tablespoon of vegetable oil.
Add the minced garlic and cook for about 30 seconds until fragrant.
Add the bell pepper, carrot, and green onions, and stir-fry for about 3-4 minutes until they start to soften.
Add the cooked noodles, chicken, and bean sprouts to the skillet.
Pour the sauce over the noodles and toss everything together until well combined and heated through.
Enjoy your meal!