Perhaps you should try some spelling variations:
"arrest and assassination of ngoc minh dien" » "arrest and assassination of ngoc anh dien", "arrest and assassination of ngoc bich dien", "arrest and assassination of ngoc lanh dien", "arrest and assassination of ngoc tinh dien", "arrest and assassination of ngoc kinh dien", "arrest and assassination of ngoc minh hien", "arrest and assassinations of ngoc minh dien"
"arrest and assassination of ngo dinh dien" » "arrest and assassination of ngo tinh dien", "arrest and assassination of ngo kinh dien", "arrest and assassination of ngo dich dien", "arrest and assassination of nghi dinh dien", "arrest and assassination of nam dinh dien", "arrest and assassination of do dinh dien", "arrest and assassinations of ngo dinh dien"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("arrest and assassination of ngo dinh dien") OR ("arrest and assassination of ngoc minh dien"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"arrest and assassination of ngo dinh dien\") OR (\"arrest and assassination of ngoc minh dien\"))".
• Removing quotes may allow a broader search: (( arrest and assassination of ngo dinh dien ) OR ( arrest and assassination of ngoc minh dien )).
• Adding a wildcard symbol may retrieve word variants: (("arrest and assassination of ngo dinh dien") OR ("arrest and assassination of ngoc minh dien"))*.