I do not know... But you sparked an interest... As I do roast Macadima nuts on occasion..
A quick Google got this...
1: http://www.trung-nguyen-online.com/about-vietnamese-coffee.php
2: http://www.vietnamese-coffee.com/vietnamese_coffee_about.php
I will leave it to you 2 do some more research and get back to us...
thanks for the link and reply

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