Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
trong cua » truong cua, thong cua, trong ca
cua dung » cua dang, cua dong, cua rung
qua dung » quang dung, su dung, qua song
cua toan » cuu toan, xuan toan, cua thanh
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: doi ((chieu sach) OR (chieu sang)) - canh tranh ((cua dung) or (qua dung)) trong cua toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - canh tranh ((cua dung) OR (qua dung)) trong cua toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - canh tranh ((cua dung) or (qua dung)) trong cua toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - canh tranh ((cua dung) or (qua dung)) trong cua toan ban*.