Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh nang » nhanh lang, nhanh mang, nhanh quang
doi chieu » doc hieu, doi chi, ho chieu
luan hoan » luan van
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap

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 - nhanh nang ((quan hoang) or (luan hoan)) ((cong dan) OR (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - nhanh nang ((quan hoang) OR (luan hoan)) ((cong dan) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - nhanh nang ((quan hoang) or (luan hoan)) ((cong dan) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh nang ((quan hoang) or (luan hoan)) ((cong dan) OR (cong san)) than cau*.