Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh mang » nhanh mang, hanh trang, nhanh lang
cong dan » huong dan, cong dong, cong tac
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
chat ban » nhat ban, chat ran, cua ban
mang va » mang vua, hang va, bang va
va dung » van dung, va duong, vat dung

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 mang va dung ((((cong dan) OR (cong san))) or (cong tan)) chat ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh mang va dung ((((cong dan) OR (cong san))) OR (cong tan)) chat ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh mang va dung ((((cong dan) OR (cong san))) or (cong tan)) chat ban".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh mang va dung ((((cong dan) OR (cong san))) or (cong tan)) chat ban*.