I've noted before that it's easiest for me to understand Vietnamese when I am inside a stereotypical situation like a restaurant or a taxi or a shop. Tonight I'm sitting in a "modern" cafe in HCMC where Vietnamese pop music is piped over a really good sound system and I find I can understand almost all the words of the songs. Pop songs, of course, have a narrow range of subjects and a remarkably limited vocabulary. Lots of lines about being "only one man" who is "alone" and always "asking" for "understanding" or "a little more time." And so on. I'm grateful for what I would otherwise find a distraction because it provides some evidence that bits and pieces of the Vietnamese language are sticking in my brain.