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
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan ban, toan tap

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 manh - hanh tranh cua ((dung cong) or (hang cong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh tranh cua ((dung cong) OR (hang cong)) manh toan cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh tranh cua ((dung cong) or (hang cong)) manh toan cau*.