Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cua thong » cua thuong, cua khong, suat thong
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh trang ((cua thong) or (cua tong)) ((cong dan) OR (cong tan)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trang ((cua thong) OR (cua tong)) ((cong dan) OR (cong tan)) than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trang ((cua thong) or (cua tong)) ((cong dan) OR (cong tan)) than ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trang ((cua thong) or (cua tong)) ((cong dan) OR (cong tan)) than ban*.