Bring a medium pot of water to boil. Add sweet potato noodles. Boil for 5 minutes. Drain and toss with 1 teaspoon soy sauce and 1 teaspoon sesame oil and set aside.
In a large pan, heat 1 tablespoon vegetable oil. Add garlic fry until fragrant, about 1 to 2 minutes. Add shrimp followed by red chilies and bean sprout.
Stir in 1 tablespoon soy sauce and salt. Continue to cook for another 3 minutes. Return sweet potato noodles to the pan. Stir to mix.
Finally, add green onions. Continue to stir to get everything well mixed.
Remove and serve immediately.