My brother brought me a gift from Vietnam: a Vietnamese style filter pot and some local Robusta beans. I followed the recipe from the bag:

• 20g coffee grounded super fine
• 10ml and 30s bloom
• 60ml of additional water (70ml with bloom water)

This yields a super concentrated 30ml cup. Not something I would drink black. The coffee flavor will come through in Vietnamese recipe involving salted cream and concentrated milk.