Is this just a really ubiquitous typo (google finds multiple headlines with the same spelling), or is the rendering of "Vietnam" into English spelling somewhat unstable?
Never seen it before today...
Definitely a typo, see "vietnam-news" in the same URL.
It is just this article.
ubiquitous? "Vienam" (with quotes) shows this page as the first result.
The only real results on Google are the article and this HackerNews post...