Bring a pot of salted water to boil.
Add noodles and cook according to package instructions until al dente.
Drain the noodles and rinse under cold water to stop cooking.
In a large skillet, heat vegetable oil over medium heat.
Add minced garlic and sauté until fragrant.
Add bell pepper, green beans, and carrot to the skillet.
Sauté vegetables for about 5 minutes until tender-crisp.
Add cooked noodles to the skillet and toss to combine.
Pour soy sauce and oyster sauce over the noodles and mix well.
Season with chili flakes and garnish with fresh cilantro before serving.