Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
va trong » va truong, va thong, va tuong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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 - ((hanh trang) or (hanh trinh)) va trong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trang) OR (hanh trinh)) va trong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((hanh trang) or (hanh trinh)) va trong cong dan toan cao*.