Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
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 lang - hanh trinh cua ((hang cong) or (dang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh trinh cua ((hang cong) OR (dang cong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh trinh cua ((hang cong) or (dang cong)) tac toan cau*.