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
mang vat » dang vat, bang vat, cang vat
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
chat ban » nhat ban, chat ran, cua ban

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 vat dung ((cong dan) or (cong tac)) chat ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - nhanh mang vat dung ((cong dan) OR (cong tac)) chat ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - nhanh mang vat dung ((cong dan) or (cong tac)) chat ban*.