Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
hoc thieu » toc thieu, hoc hien
thanh qua » thanh quan, thanh qui, hanh qua
dung cong » dung trong
doc hieu » toc thieu, hoc hien
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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) or (hoc thieu)) manh - doanh thanh qua dung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) manh - doanh thanh qua dung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) manh - doanh thanh qua dung cong tan tran cau*.