This house on a hẻm (lane) off Phạm Ngũ Lão and Cống Quỳnh Streets in Quận (District) One of TP. Hồ Chí Minh is an example of pure formal modernism, particularly in its minimalism -- all white.
There is very little light and no views at this location on the hẻm, so there is no need for elaborate openings on the lower floors. Typically, the middle floors are for sleeping rooms in southern Vietnamese urban houses, so ventilation is the only requirement on the facade. In this case, the grate covering most of the building does the job elegantly.
Notice that the house is only about 2 meters wide (7 feet). The sign on the gate says "Nhà Bán" meaning "house for sale".