"This pancit is a favorite Filipino noodle dish that is usually served when you have company. Though time consuming, the end result is always delicious. It can be eaten alone or with rice. Skip the canton noodles if only bihon is desired."
Soak bihon in a bowl of warm water until soft, about 5 minutes. Drain.
Heat oil in a large wok over medium-high heat. Saute onion and garlic until onion is translucent, about 5 minutes. Add chicken, salt, and pepper. Cook and stir until flavors combine, about 3 minutes. Add shrimp; cook until they start to turn color, about 1 minute. Add soy sauce; toss in cabbage, celery, and carrot. Cook until well combined, about 2 minutes. Add 2 cups water; bring to a boil. Cook until vegetables begin to soften, about 2 minutes.
Transfer chicken, shrimp, and vegetables to a bowl, leaving the liquid behind in the wok. Add bihon and canton noodles to the liquid. Mix well and cover. Let sit until tender, about 5 minutes. Return 1/2 the chicken-vegetable mixture to the wok; mix with the noodles. Pour soup into bowls; garnish with the remaining chicken-vegetable mixture.