Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua hang » cua dang, cua nhung, cua cong
cong van » cong vang, cong san, song van
toan cau » toan cao, toan ban, toan tap
van cau » van dau, van hau, van chat

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