Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
van thanh » van tuan
ban thanh » ban hanh, ban hang
tang cua » mang cua, hang cua, tang luan

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

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