Perhaps you should try some spelling variations:
"battle of Đien gian phu" » "battle of Đien gian xu", "battle of Đien san phu", "battle of Đien bien phu"
"battle of Đien van phan" » "battle of Đien van phong", "battle of Đien van thanh", "battle of Đien luan phan"
"battle of Đien van phu" » "battle of Đien san phu", "battle of Đien van phung", "battle of Đien van phat"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("battle of Đien gian phu") or ((("battle of Đien van phu") OR ("battle of Đien van phan"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("battle of Đien gian phu") OR ((("battle of Đien van phu") OR ("battle of Đien van phan")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"battle of Đien gian phu\") or (((\"battle of Đien van phu\") OR (\"battle of Đien van phan\"))))".
• Removing quotes may allow a broader search: (( battle of Đien gian phu ) or ((( battle of Đien van phu ) OR ( battle of Đien van phan )))).
• Adding a wildcard symbol may retrieve word variants: (("battle of Đien gian phu") or ((("battle of Đien van phu") OR ("battle of Đien van phan"))))*.