Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
thanh tung » thanh cong
quan trong » gian trong
tung quan » tuong quan, trung quan, dung quan
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((chieu sang) OR (chieu xanh)) - thanh tung quan trong cong san toan ban~".
• Adding a wildcard symbol may retrieve word variants: toc ((chieu sang) OR (chieu xanh)) - thanh tung quan trong cong san toan ban*.