Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
chau tinh » cuu tinh, ha tinh, cua tinh
dung cong » dung trong
anh tang » anh dang, anh nang, anh sang
anh bang » anh hoang, anh quang, tinh bang
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: theo ((hieu manh) or (chau tinh)) - ((anh tang) or (anh bang)) cua dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chau tinh)) - ((anh tang) OR (anh bang)) cua dung cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chau tinh)) - ((anh tang) or (anh bang)) cua dung cong tan toan cau*.