Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
hanh doanh » hang doanh, chinh doanh, kinh doanh
hieu sang » chieu sang, hieu lang, hieu quang
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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) OR (doanh doanh)) quan hang cong dan ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - ((hanh doanh) OR (doanh doanh)) quan hang cong dan ((phan dau) OR (phan cac))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sang - ((hanh doanh) OR (doanh doanh)) quan hang cong dan ((phan dau) or (phan cac))*".