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
nong cong » cong cong, tong cong, nang cong
cua nong » cua cong, cuu nong, cua dong
cong tan » cong tac, cong san, cong thanh
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 nong cong tan ((thanh chau) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hiem ngan) OR (viem gan)) - thanh trung cua nong cong tan ((thanh chau) or (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hiem ngan) OR (viem gan)) - thanh trung cua nong cong tan ((thanh chau) or (khan cap))*.