Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, nhieu tang
thanh duoc » hanh duoc, tranh duoc, thanh phuoc
dong huong » dong thuong, dong duong, cong huong
hieu lang » hieu quang, nhieu tang, hieu van
duoc dong » duc dong, dao dong, dung dong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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))) or (hieu lang)) - dinh thanh duoc dong huong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((chieu sach) OR (chieu sang))) OR (hieu lang)) - dinh thanh duoc dong huong dan than cau.
• Adding a wildcard symbol may retrieve word variants: doi ((((chieu sach) or (chieu sang))) or (hieu lang)) - dinh thanh duoc dong huong dan than cau*.