Perhaps you should try some spelling variations:
cong hoach » cong hoa, cong hoan, cong sach
dung cong » dung trong
cho nhau » cho nha, cho nhan, cho phan
anh tang » anh bang, anh dang, anh nang
tang lan » tang luan, tang van, tang dan
lan dung » van dung, dan dung, lan hung
toan cao » toan ban
toan tap » toan ban
cho rau » cho mau, cho rac

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 rau) OR (cho nhau)) sach - anh tang lan dung cong hoach ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cho rau) or (cho nhau)) sach - anh tang lan dung cong hoach ((toan cao) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((cho rau) or (cho nhau)) sach - anh tang lan dung cong hoach ((toan cao) OR (toan tap))*.