There's assorted comments below that are similar to my view.
1stly there are at least a few products on sale (e.g. tins of corned beef hash, tins of tuna chunks) that quite clearly are not vegetarian. There's also other products on sale that with a little examination I suspect are unlikely to be vegetarian due to some of the ingredients used.
There's a lot of products on sale that seem to be general western products that I wouldn't particularly expect to see in a health food shop (e.g. Kellog's breakfast cereals, doritos). There's other things in there that I would expect to see such as a few Amy's Kitchen products and at least one product advertising itself as gluten free.
I'm well enough educated on what the availability and quality of health food shops is like in HCMC to be able to comment otherwise. Thus while this place seems underwhelming, as others have said it may possible be of use to some.
Cons: Not 100% vego (corned beef hash, tuna)