Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
cong cong » cong dong, trong cong, dung cong
trung da » trung dai, trung dam, truong da
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
da cong » dai cong, dam cong, va cong

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 (chieu sach)) - thanh trung da cong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh trung da cong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - thanh trung da cong cong dan than cau*.