Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trung » thanh trung, hanh trang, manh trung
nhung tung » nhung tuong, nhung vung, nhung huong
nhung dung » phuong dung, ung dung, thong dung
trung cua » truong cua, trung tuan, trung cap
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 (chiet tach)) - hanh trung cua ((nhung tung) OR (nhung dung)) dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - hanh trung cua ((nhung tung) or (nhung dung)) dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - hanh trung cua ((nhung tung) or (nhung dung)) dan toan cau*.