Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
manh tung » manh hung, thanh tung
tung cua » trung cua, tuong cua, dung cua
cua bang » chua bang, cua ban, cua dang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

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 - manh tung cua bang ((cong dan) OR (cong san)) phan cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - manh tung cua bang ((cong dan) or (cong san)) phan cau*.