Perhaps you should try some spelling variations:
thanh tieng » hanh tieng, thanh tien, thanh tung
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
viet dung » viet hung, viet huong, viet trung
dang van » hoang van, hang va
dan van » doan van, dao van, tan van

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 sach) OR (chieu sang)) - thanh tieng viet dung trong ((dan van) or (dang van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - thanh tieng viet dung trong ((dan van) OR (dang van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - thanh tieng viet dung trong ((dan van) or (dang van)) ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - thanh tieng viet dung trong ((dan van) or (dang van)) ban*.