Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
cua hang » cua dang, cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: hoc hieu manh - hanh tinh ((cua hang) or (cua nhung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tinh ((cua hang) OR (cua nhung)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tinh ((cua hang) or (cua nhung)) cong tac toan cau*.