Perhaps you should try some spelling variations:
thien chinh » tien thinh, thien chien, thi chinh
hanh tang » hanh trang, anh tang, hanh mang
nang cong » nang song, dang cong, bang cong
tang khu » tai khu, tang ha, tang thi
khu nang » kha nang, chuc nang, chua nang
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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: thien chinh sach - hanh tang khu nang cong ((dan toan) OR (van toan)) cao~.
• Adding a wildcard symbol may retrieve word variants: thien chinh sach - hanh tang khu nang cong ((dan toan) or (van toan)) cao*.