I dont know the exact law or where to find it. Just what I read in some translated news articles. Ive heard multiple times that cops will give DUI's for having a single beer in your system and showing any kind of alcohol content regardless of how little. Is this true or is there like a set amount? For example the US has a blood alcohol level of .08. Surely in vietnam it cant be .0001 percent or something so little right? Maybe it is but just double checking.