Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
dang quang » dung quang, nang quan, dang hung
quang dung » quang trung, ung dung, cuong dung
hanh dang » hanh dong, anh dang, hanh dung
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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 xanh)) - hanh dang quang dung trong ((dan toan) OR (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu xanh)) - hanh dang quang dung trong ((dan toan) OR (manh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chieu xanh)) - hanh dang quang dung trong ((dan toan) OR (manh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu xanh)) - hanh dang quang dung trong ((dan toan) OR (manh toan)) cau*.