Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
luan nhung » luan chung, luan hung, quan nhung
hoc thieu » toc thieu, hoc hien
dong luan » dung luan, tong luan, dong xuan
anh dong » anh huong, anh son
cong van » cong vang, song van, cong tan
cong san » cong tac
van cau » van dau, van hau, van chat

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 thieu sach - anh dong luan nhung ((cong van) OR (cong san)) van cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - anh dong luan nhung ((cong van) or (cong san)) van cau*.