Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
trung quan » trong quan, trung tuan, truong quang
thanh chau » thanh cha, thanh cham, thanh chu
hiem ngan » kim ngan, viem gan
nong cong » cong cong, tong cong, nang cong
hoc hiem » hoc hien, hoc thieu, hoc thiet
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 - thanh ((trung quan) OR (truong quan)) nong cong tan ((thanh chau) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hiem ngan - thanh ((trung quan) OR (truong quan)) nong cong tan ((thanh chau) or (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - thanh ((trung quan) OR (truong quan)) nong cong tan ((thanh chau) or (khan cap))*.