Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, hang cong, nhung lang
thong cong » trong cong, tong cong, thong thong
hanh dung » thanh dung, anh dung, hanh dong
nhung don » nhung van, nhung bo
doc hieu » toc thieu, hoc thieu, hoc hien
dung cua » dung luan, dung cho
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 - hanh dung cua ((((nhung cong) OR (nhung don))) or (thong cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - hanh dung cua ((((nhung cong) OR (nhung don))) OR (thong cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - hanh dung cua ((((nhung cong) OR (nhung don))) or (thong cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - hanh dung cua ((((nhung cong) OR (nhung don))) or (thong cong)) dan than cau*.