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
dan cong » dang cong, van cong, dan dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
cua dan » cua dang, cua ban, ca dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) or (hieu lang)) - thanh trung cua dan cong tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - thanh trung cua dan cong tan ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu lang)) - thanh trung cua dan cong tan ((toan cau) or (toan ban))*.