Whisk together soy sauce, oyster sauce, sesame oil, and minced garlic in a small bowl and set aside.
Heat vegetable oil in a large wok or skillet over high heat until shimmering.
Add cabbage, celery, and onion, and stir-fry for 3 to 4 minutes until softened but still crisp.
Add the noodles and stir-fry for 2 to 3 minutes, tossing constantly to separate and heat through.
Pour the sauce over the noodles and vegetables, and toss for 1 to 2 minutes until evenly coated and glossy.
Serve immediately while hot for the best texture and flavor.