Wash the pork ribs and drain it well.
In a pan, add a little bit of oil, and on high heat sear the ribs until all the sides are nicely golden brown.
Add vinegar and sugar, and mix it thoroughly until the pork odor has reduced and the sugar has caramelized.
Add soy sauce, fish sauce, garlic, onion, scallions, red pepper flakes, and ketchup. Mix it thoroughly until all the sauces are well combined.
Continue to saute the pork in the sauce until every piece of pork gets coated with the sauce.
Add water, give it one last mix, cover, turn the heart to low, and braise it down for 40 minutes.
Serve with rice or noodles and some side dishes. Enjoy!