Hey there!
That must have been a fantastic trip to Vietnam, and I'm happy that you got the chance to sample a coffee that suits you. I know of Vietnamese having some speciality coffee such as the egg coffee that they are famous for. However, when thinking of one of the best coffees in the world, Vietnam is not the country that is foremost on my mind.
Thanks for sharing this with us, I would suggest that you check the work of other authors, and perhaps leave them comments, as engagement is a great part of our virtual coffee shop experience.