What is up with Nha Trang and Russians

Not wanting to be racist just genuine question, is it because communist countries had interaction through this city? It is swamped with Russians, I think in the area I am (center close to the beach, I imagine the most touristy) I certainly see more Russians than Vietnamese citizens, most shops have translation in cyrillic alphabet, etc. Since the rest of Viet Nam is not like this I am intrigued. And also I don't want to be mean why all white as snow this is the beach but certainly has no effect on them (don't take this the wrong way please)