Perhaps you should try some spelling variations:
hieu sang » chieu sang, hieu lang, hieu quang
doc hieu » toc thieu, hoc thieu, hoc hien
anh mang » hanh mang, anh bang, anh dang
mang chu » lang chu, mang cho, nang chiu
chu bang » thu bang, chuc nang, chu quang
cong tac » cong ty
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - anh mang chu bang ((cong san) or (cong tac)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - anh mang chu bang ((cong san) OR (cong tac)) than cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - anh mang chu bang ((cong san) or (cong tac)) than cau*.