Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hieu manh, nghiep nganh
hiem ngan » kim ngan, viem gan
hanh tang » hanh trang, anh tang, hanh mang
tong cong » trong cong, cong cong, dung cong
tang cua » mang cua, hang cua, tang luan
cua tong » cua cong, cua dong, cua nong
thanh ca » thanh cha, thanh cac, thanh va
thanh ha » thanh hoa, thanh hai, nhanh ha

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu nganh) or (hiem ngan)) - hanh tang cua tong cong dong ((thanh ca) OR (thanh ha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hiem ngan)) - hanh tang cua tong cong dong ((thanh ca) OR (thanh ha))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) or (hiem ngan)) - hanh tang cua tong cong dong ((thanh ca) OR (thanh ha))*".