Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu hach » thien hach, chieu sach, hieu cach
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap
hieu ca » hieu cac, hieu cua, hieu va

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: hoc ((((thieu hach) OR (hieu ca))) OR (chinh sach)) - canh tranh cua nhung cong san than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu hach) or (hieu ca))) or (chinh sach)) - canh tranh cua nhung cong san than cau*.