Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chinh sach)) - hanh trinh cua nhung ((cong dan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chinh sach)) - hanh trinh cua nhung ((cong dan) OR (cong san)) phan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chinh sach)) - hanh trinh cua nhung ((cong dan) or (cong san)) phan cau*".