Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
luan nhung » luan chung, quan nhung, luan phuong
hieu sang » chieu sang, hieu lang, hieu quang
luan hung » luan chung, lan hung, luan ung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - hanh doanh ((luan nhung) OR (luan hung)) cong dan ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh doanh ((luan nhung) OR (luan hung)) cong dan ((than cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - hanh doanh ((luan nhung) OR (luan hung)) cong dan ((than cau) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh doanh ((luan nhung) OR (luan hung)) cong dan ((than cau) or (phan dau))*.