Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tang thanh » dang thanh, trung thanh, hoang thanh
hanh mang » nhanh mang, hanh trang, nhanh lang
cong tang » cong thang, cong tan, cong lang
thanh cac » hanh cac, thanh bac, thanh ca
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (trieu tinh)) - hanh mang ((cua dung) OR (cua dong)) cong tang thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (trieu tinh)) - hanh mang ((cua dung) OR (cua dong)) cong tang thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (trieu tinh)) - hanh mang ((cua dung) OR (cua dong)) cong tang thanh cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (trieu tinh)) - hanh mang ((cua dung) OR (cua dong)) cong tang thanh cac*.