Is dating a thing in Vietnam?  

Of course dating is a thing in Vietnam. Some people may be more conservative and want marriage right away. But things are changing and people are more accepting of dating first before marriage. Some people just date.  

Some people just date.  

Yeah, there's dating in Vietnam, just like any other place. There are different beliefs in Vietnam though, so it's probably more so that people do want to get married, but I think times are changing and we'll see more people dating and not getting married. 

There are plenty of people in the metropolitan areas who date casually while most people in the countryside date to marry. Parents usually don't want their children to date until they're adults or done with school though.

Dating is a thing all over the world. when girl and boy are ready to do that.

Yeah, it's pretty much the whole world, unless you're in certain parts of the world who have differing rules in their religions/faith. For the most part, the whole world is full of people who date.