Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » hieu quang, nhieu tang, hieu van
quoc vung » quoc vuong, quoc hung, nuoc vung
vung cong » dung cong, vung dong, vung song
thanh van » thanh san, thanh toan, thanh phan

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) or (hieu lang)) - thanh trung quoc vung cong thanh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung quoc vung cong thanh van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung quoc vung cong thanh van ban*.