Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
cua trong » cua truong, cua trung, qua trong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
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: ho ((((chinh sach) or (chieu sang))) or (hieu lang)) - thanh trung cua trong cong tan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chinh sach) OR (chieu sang))) OR (hieu lang)) - thanh trung cua trong cong tan than cau.
• Adding a wildcard symbol may retrieve word variants: ho ((((chinh sach) or (chieu sang))) or (hieu lang)) - thanh trung cua trong cong tan than cau*.