Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
trong dang » truong dang, trong dong, trong dung
tranh cua » doanh cua, manh cua
trong dan » trong san, trong tan, trong ban
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
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 ((trong dan) OR (trong dang)) ((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 ((trong dan) OR (trong dang)) ((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 ((trong dan) OR (trong dang)) ((doanh tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - canh tranh cua dung ((trong dan) OR (trong dang)) ((doanh tai) or (toan cao))*.