Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
tinh bang » tinh sang, tinh lang, tinh quang
bang luan » tang luan, hang luan, dung luan
luan tang » luan nang, lan tang, xuan trang
cuon danh » cuong danh, cuoi dan, cum danh
tuan cau » toan cau, quan cau, tuan cu

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 - tinh bang luan tang ((cong trinh) OR (cuon danh)) tuan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - tinh bang luan tang ((cong trinh) or (cuon danh)) tuan cau*.