Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen thi minh khai", "nguyen can minh khai", "nguyen nhu minh khai", "nguyen chi minh khue", "nguyen chi minh chau", "nguyen chi minh chi"
"nguyen huu minh khai" » "nguyen duc minh khai", "nguyen huu minh khue", "nguyen huu minh chau", "nguyen huu minh chi", "nguyen huu dinh khai", "nguyen huu manh khai", "nguyen huu binh khai"
"nguyen huy minh khai" » "nguyen duy minh khai", "nguyen duc minh khai", "nguyen ly minh khai", "nguyen huy minh khue", "nguyen huy minh chau", "nguyen huy minh chi", "nguyen huy sinh khai", "nguyen huy binh khai"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("nguyen chi minh khai") or ((("nguyen huu minh khai") or ("nguyen huy minh khai"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nguyen chi minh khai") OR ((("nguyen huu minh khai") OR ("nguyen huy minh khai")))).
• Removing quotes may allow a broader search: (( nguyen chi minh khai ) or ((( nguyen huu minh khai ) or ( nguyen huy minh khai )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen chi minh khai") or ((("nguyen huu minh khai") or ("nguyen huy minh khai"))))*.