Perhaps you should try some spelling variations:
cong hoach » cong hoa, cong hoan, cong sach
dung cong » dung trong
nhau sach » hau sach, khau sach, ngan sach
cho nhau » cho nha, cho nhan, cho phan
anh nang » ganh nang, anh dang, anh sang
anh bang » anh hoang, anh quang, tinh bang
lan dung » van dung, dan dung, lan hung
toan cao » toan ban
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: cho nhau sach - ((anh nang) OR (anh bang)) lan dung cong hoach ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho nhau sach - ((anh nang) or (anh bang)) lan dung cong hoach ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: cho nhau sach - ((anh nang) or (anh bang)) lan dung cong hoach ((toan cao) OR (toan tap))*.