Perhaps you should try some spelling variations:
quang dung » quang trung, ung dung, cuong dung
bien tinh » bi tinh, yen tinh, diep tinh
hanh manh » lanh manh, hoang manh, thanh minh
hanh mang » nhanh mang, hanh trang, nhanh lang
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
dien » vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: dien bien tinh - ((hanh manh) or (hanh mang)) quang dung ((cong dan) OR (cong san)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dien bien tinh - ((hanh manh) OR (hanh mang)) quang dung ((cong dan) OR (cong san)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dien bien tinh - ((hanh manh) or (hanh mang)) quang dung ((cong dan) OR (cong san)) van ban".
• Adding a wildcard symbol may retrieve word variants: dien bien tinh - ((hanh manh) or (hanh mang)) quang dung ((cong dan) OR (cong san)) van ban*.