Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
nhung dong » nhung don, nhung cong, nhung dung
hieu cach » hieu cac, chieu sach, hieu ca
cua nhung » va nhung
dong sang » dong bang, dong san, dong nang
sang than » cang thang, dang thanh, sang tao
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) or (chiet tach)) - ((thanh trung) or (thanh tung)) cua nhung dong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chiet tach)) - ((thanh trung) OR (thanh tung)) cua nhung dong sang than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chiet tach)) - ((thanh trung) or (thanh tung)) cua nhung dong sang than cau*.