Someone said "No matter how tall and skinny a building, it seems that there is always room for more storeys." This is the reality of Vietnamese architecture and I'm not sure that you can see this any where else in the world. Because Viet nam doesn't have much land and our population is increasing unbelievably fast, property in Hanoi and in other big cities is very expensive and the price rises everyday.
If you have a good look inside a typical house, you may be surprised because there are about 8 0r 9 people living in such a small area. Sometimes they don't even have a permanent bed, a garden hardly ever. They only put mattresses or mats down before they sleep then they fold them back up in the morning. And imagine, there is one tiny kitchen and bathroom in one house. What do you really think? Could you live in this situation?