Can you lip read Vietnamese?

I knew I wouldn't last a week before another question. Oh well.

Lip reading. It would be a fair challenge to get accurate, obviously. That's in English. What about in languages like Vietnamese or Cantonese, where you can have the same word, with the same lip movements, eg. MA, that pronounced or stressed different ways can have up to 6 different meanings.
Are the context and words around it enough to be able to succesfully do it?