Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
tran tran » tan tran, tran tan, toan tran
tran tuan » tran xuan, tran quang, tran thanh
trong tac » trong cac, tuong tac, trong tan
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (chieu xanh)) - thanh ((tran tran) OR (tran tuan)) dung trong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu xanh)) - thanh ((tran tran) OR (tran tuan)) dung trong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (chieu xanh)) - thanh ((tran tran) OR (tran tuan)) dung trong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu xanh)) - thanh ((tran tran) OR (tran tuan)) dung trong tac toan ban*.