Perhaps you should try some spelling variations:
thanh trung » thanh tung
tang quang » dang quang, tang quan, hang quang
hien sach » dien sach, kien sach, thien hach
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
tam ban » tai ban, tao ban, tay ban

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 hien sach - thanh trung ((tang quang) OR (tam ban)) cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc hien sach - thanh trung ((tang quang) or (tam ban)) cong dan than cau*.