There is a style of Vietnamese modernist painting which is quite colorful and striking. Hotel front desks should know the locations of the closest mini-marts. The range of western goods available increases every month. Perfectly acceptable quality. Nestle predominates but other brands are available.
Some western shops have small selections of jarred food.
Infant shampoo, lotion, baby powder. Bottles, cups, pacifiers. Infant and children's clothing and shoes. Your brand might not be available but something close should be. Popular sodas, including Diet Coke.