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