Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
theo bien » thieu bien, theo tieu, che bien
bien tinh » bi tinh, yen tinh, diep tinh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan 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: theo bien tinh - thanh trung cua nhung cong dan ((toan cao) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: theo bien tinh - thanh trung cua nhung cong dan ((toan cao) or (toan tap))*.