Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
tranh cua » doanh cua, manh cua
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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 - canh tranh cua dung ((cong dan) OR (cong tan)) ((doanh tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - canh tranh cua dung ((cong dan) OR (cong tan)) ((doanh tai) OR (toan cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - canh tranh cua dung ((cong dan) OR (cong tan)) ((doanh tai) or (toan cao))*".