Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh
nhieu tang » nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, hieu van, biet lang
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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: theo ((chieu sang) or (((hieu lang) OR (nhieu tang)))) - thanh trung va nhung cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (((hieu lang) OR (nhieu tang)))) - thanh trung va nhung cong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (((hieu lang) OR (nhieu tang)))) - thanh trung va nhung cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (((hieu lang) OR (nhieu tang)))) - thanh trung va nhung cong dan than cao*.