Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
thanh lap » thanh san, phan lap, thanh hai
hien anh » hien hanh, thien anh, dien anh
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
phan cau » phan dau, phan cac, phan tu
khan ap » khan cap, han ap, khan dam

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 anh - thanh trung cua tong cong dan ((phan cau) OR (((thanh lap) OR (khan ap))))~.
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - thanh trung cua tong cong dan ((phan cau) or (((thanh lap) or (khan ap))))*.