01 - Soak bihon noodles in warm water for 10 minutes until softened. Drain well and set aside.
02 - Heat 2 tablespoons oil in a large wok or skillet over medium-high heat. Sauté garlic and onion until fragrant and translucent, about 2 minutes.
03 - Add chicken slices and cook until lightly browned and cooked through, about 5 minutes. Add shrimp and stir-fry until pink, about 2 minutes. Remove from pan and set aside.
04 - In the same pan, add carrots, cabbage, and snow peas. Stir-fry for 2-3 minutes until just tender-crisp.
05 - Return chicken and shrimp to the pan. Pour in soy sauce, oyster sauce, fish sauce, and chicken broth. Bring to a simmer.
06 - Add drained bihon noodles, tossing gently with tongs to combine. Cook for 3-4 minutes until noodles are heated through and have absorbed the sauce.
07 - Season with black pepper. Adjust salt or sauces to taste if needed. Transfer to serving platter, garnish with scallions, and serve with lemon or calamansi wedges.