Ao Yem, also referred to simply as "Yem", is an ancient Vietnamese bodice used primarily as an undergarment that was once worn by Vietnamese women across all classes.
The “Ao Tu than” or “four-part dress” is one out of several traditional Vietnamese costumes.
The Ao Dai, literally meaning "long dress" or "long tunic," is one out of many traditional Vietnamese costumes worn (nowadays) primarily by women. It is the most popular national costume in Vietnam