Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
tranh cua » doanh cua
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
cong dan » cong san, cong tan, huong dan
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) OR (manh cua)) dung cong dan ((doanh tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu nganh - canh ((tranh cua) OR (manh cua)) dung cong dan ((doanh tai) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - canh ((tranh cua) OR (manh cua)) dung cong dan ((doanh tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - canh ((tranh cua) OR (manh cua)) dung cong dan ((doanh tai) or (toan cao))*.