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 tung
hanh mang » nhanh mang, hanh trang, nhanh lang
luan cong » luat cong, luong cong, luan chung
cong cong » cong dong, trong cong, dung cong
cong dang » cong dong, cong dan, cong dung
dang hanh » dang thanh, ban hanh, dang van
hanh ca » hanh cac, hanh cat, hanh cua

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) OR (hanh mang)) luan cong cong dang hanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hiem ngan)) - ((hanh tang) OR (hanh mang)) luan cong cong dang hanh ca*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu nganh) or (hiem ngan)) - ((hanh tang) OR (hanh mang)) luan cong cong dang hanh ca*".