Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
thieu sach » chieu sach, thien hach, theo sach
hieu cach » hieu cac, chieu sach, hieu ca
hua khong » hoa khong, cua khong, hoac khong
ca thuong » cao thuong, cua thuong, va thuong
cong luan » tong luan, cong tuan, dong luan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (hieu cach)) - hanh doanh ((hua khong) or (ca thuong)) cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - hanh doanh ((hua khong) OR (ca thuong)) cong luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - hanh doanh ((hua khong) or (ca thuong)) cong luan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - hanh doanh ((hua khong) or (ca thuong)) cong luan van ban*.