Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
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: theo hieu lang - doanh doanh cua tong cong tan ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - doanh doanh cua tong cong tan ((phan dau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - doanh doanh cua tong cong tan ((phan dau) or (phan cac))*.