Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
cua rung » cua trung, cua rang, cua truong
cua dang » cua cong, cua ban
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh trung ((cua rung) or (cua dang)) cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung ((cua rung) OR (cua dang)) cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung ((cua rung) or (cua dang)) cong tac tran cau*.