Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh chau » thanh cha, thanh cham, thanh chu
hiem ngan » kim ngan
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
cua tong » cua cong, cua dong, cua nong
cong san » cong tac
khan cap » khan ap, than cap, khoan cam

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 ((hiem ngan) OR (viem gan)) - thanh trung cua tong cong san ((thanh chau) OR (khan cap))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hiem ngan) or (viem gan)) - thanh trung cua tong cong san ((thanh chau) or (khan cap))*.