Perhaps you should try some spelling variations:
chiet tach » chieu sach
cong thanh » dong thanh, cong trinh, cong tan
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh tang cua nhung ((cong san) or (cong thanh)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh tang cua nhung ((cong san) OR (cong thanh)) van ban.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh tang cua nhung ((cong san) or (cong thanh)) van ban*.