Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
hieu cach » hieu cac, chieu sach, hieu ca
hua khong » hoa khong, cua khong, hoac khong
ca thuong » cao thuong, cua thuong, va thuong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
san van » tan van, luan van, tran van

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 - chinh doanh ((hua khong) or (ca thuong)) cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - chinh doanh ((hua khong) OR (ca thuong)) cong san van ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - chinh doanh ((hua khong) or (ca thuong)) cong san van ban*.