Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
cong tuan » cong tan, cong luan, cong thanh
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
san toan » van toan, dan toan, xuan toan

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