Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh doanh » hang doanh, chinh doanh, doanh doanh
cua thuong » cua truong, cua phuong, ca thuong
cua khong » hua khong, cua phuong, cua cong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - hanh doanh ((cua khong) or (cua thuong)) cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - hanh doanh ((cua khong) OR (cua thuong)) cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - hanh doanh ((cua khong) or (cua thuong)) cong tan van ban*.