Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
canh sinh » canh tinh, canh binh, tinh sinh
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu
sinh va » sinh vat, tinh va, dinh van
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chinh sach)) - canh sinh va bang ((cong dan) OR (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - canh sinh va bang ((cong dan) OR (cong san)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - canh sinh va bang ((cong dan) OR (cong san)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - canh sinh va bang ((cong dan) OR (cong san)) phan cau*.