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
trung tuan » trung thanh, trung tam, tran tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
tac tran » tan tran, tac trai, tac trong
tac tren » rac tren, tai tren, tap tren

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 (chieu sach)) - thanh trung tuan dung cong ((tac tran) OR (tac tren)) tuan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - thanh trung tuan dung cong ((tac tran) OR (tac tren)) tuan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chieu sach)) - thanh trung tuan dung cong ((tac tran) OR (tac tren)) tuan".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu sach)) - thanh trung tuan dung cong ((tac tran) OR (tac tren)) tuan*.