Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
cua nhung » va nhung
cong manh » cong danh, duong manh, cong thanh
manh van » anh van, menh van, canh van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((thanh trung) OR (thanh tung)) cua nhung cong manh van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - ((thanh trung) or (thanh tung)) cua nhung cong manh van ban*.