Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
dang cong » dung cong
cong danh » cuong danh, cong dan, cong thanh
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh vu » tran vu, tranh va, tranh cua
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
vu dang » su dang, vu quang, cua dang

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