Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhanh mang » nhanh lang, hanh mang, nhanh quang
hoc chieu » hoc thieu, ho chieu, hoc hien
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
chat ban » nhat ban, chat ran, can 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 - nhanh mang va dung ((cong dan) or (cong tac)) ((chat ban) OR (cua ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - nhanh mang va dung ((cong dan) OR (cong tac)) ((chat ban) OR (cua ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - nhanh mang va dung ((cong dan) or (cong tac)) ((chat ban) OR (cua ban))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - nhanh mang va dung ((cong dan) or (cong tac)) ((chat ban) OR (cua ban))*.