Vietnam is now the world's second largest coffee producer behind Brazil, and beats out Colombia by a significant margin. However, Vietnam has yet to contribute significantly to the world's specialty coffee market.
Vietnam Coffee and Espresso Brewing Tips
For step-by-step instructions see Pulling A Perfect Espresso Shot as well as How to make a Latte.
For detailed definitions of coffee terminology see the Coffee Terms. Also see the World's Best History of Coffee.
Gabriel Hillel says
I have tried many of the coffees you describe as being among the best, including the Costa Rican labels. My preference when home-brewed is QY ("key") coffee from Viet Nam. Let me know your thoughts, if you can find the brand.