Cut ribs into segments.
In a medium bowl, mix the fish sauce, black pepper, chili powder, jeaw bong, and BBQ sauce. Mix well.
Rub the mixture all over the ribs.
Place the wire trivet rack in the instant pot.
Add the water, vinegar, and liquid smoke in the pot.
Put the ribs into the pot.
Press "pressure cook" and cook on high pressure for 35 mins.
When the pot beeps, allow the natural release for 10 mins, then turn the valve to quick release.
Carefully remove the ribs to a serving plate and lather more BBQ on them.
Garnish with green onions.
Make the broth into soup.