Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
chiet tach » chieu sach
hanh trinh » hanh chinh
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (chiet tach)) - ((hanh trinh) OR (canh tranh)) cua dung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (chiet tach)) - ((hanh trinh) OR (canh tranh)) cua dung cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (chiet tach)) - ((hanh trinh) OR (canh tranh)) cua dung cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (chiet tach)) - ((hanh trinh) OR (canh tranh)) cua dung cong dan van ban*.