Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
hanh mang » nhanh mang, hanh trang, nhanh lang
xa truong » cac truong
cua trung » cua truong, xuan trung, cua nhung
cong tap » cuong tap, cong tac, cong tan
tap dan » tap doan, tap danh, tap 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 thieu sach - hanh mang ((xa truong) OR (cua trung)) cong tap dan ca~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh mang ((xa truong) or (cua trung)) cong tap dan ca*.