Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
trong dan » trong dang, trong san, trong tan
van dung » van dong, xay dung, tin dung
gian cam » gian cham, gian cac, gia cam
va dung » va duong, vat dung, va ung

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

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