A Japanese blogger in Saigon, Nelson Mizushima published an article “Eating 10 kinds of noodles in Vietnam”
This is a very interesting and useful article for expats or tourists in Vietnam. Although we know there are many kinds of noodles in Vietnam, everybody may not know what kind of noodles are eaten here. He reported with eating 10 kinds of popular noodles in Saigon at the same time.
The article is in Japanese but you may read it with Google translate here