Soak rice noodles as listed on the package instructions, stirring to separate and set aside.
Heat oil in 12” skillet or wok on high heat.
Add peppers, onions, and crushed red peppers and cook until onions begin to wilt.
Add garlic and cook until fragrant.
Add sweet soy sauce, oyster sauce, soy sauce, fish Sauce and sugar. Mix until combined.
Drain noodles and add to skillet. Stir-fry until noodles are tender, about 4 minutes.
Mix in basil leaves and vinegar. Continue to cook until basil begins to wilt.
If you do not have any sweet soy sauce, make your own by mixing 3 parts soy sauce to 1 part dark brown sugar. Simmer together in a saucepan until sugar is dissolved and sauce is slightly thickened.