Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
tong thong » thong thong, dong thong, cong thong
hieu lang » hieu quang, nhieu tang, hieu van
trung cap » truong cao, trung tam
cap tong » cap nong, cap hoang, gap trong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) OR (hieu lang)) - thanh trung cap tong thong ((dan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - thanh trung cap tong thong ((dan toan) OR (dan than)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (hieu lang)) - thanh trung cap tong thong ((dan toan) or (dan than)) tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (hieu lang)) - thanh trung cap tong thong ((dan toan) or (dan than)) tap*.