Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu manh) or (trieu tinh)) - hanh tranh cua dung cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (trieu tinh)) - hanh tranh cua dung cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (trieu tinh)) - hanh tranh cua dung cong tan van ban*.