Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
tranh ve » trinh ve, thanh ve, tranh va
cong bai » cuong bai, cong hai, cung bai
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu
ve dung » ve duong, ve rung, va dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu manh - canh tranh ve dung cong bai ((toan cau) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu manh - canh tranh ve dung cong bai ((toan cau) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu manh - canh tranh ve dung cong bai ((toan cau) or (van ban))*.