Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh thanh, dong doanh
doanh hoan » doanh khoa, doanh nhan, doanh luan
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, cua tong
hoc hieu » hoc thieu, hoc hien, doc hieu
dan phan » doan phan, dan chan, dam phan
van phan » van phong, van thanh, luan phan

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

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