Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen thi minh khai", "nguyen can minh khai", "nguyen hai minh khai", "nguyen chi minh chau", "nguyen chi minh chi", "nguyen chi minh pham"
"nguyen nhu minh khue" » "nguyen thi minh khue", "nguyen huu minh khue", "nguyen huy minh khue", "nguyen thu minh khue", "nguyen nhu binh khue", "nguyen phu minh khue"
"nguyen nhu minh khoe" » "nguyen thi minh khoe", "nguyen huu minh khoe", "nguyen huy minh khoe", "nguyen nhu minh khoi", "nguyen nhu minh hoa", "nguyen nhu sinh khoa", "nguyen thu minh khoe", "nguyen nhu binh khoe", "nguyen phu minh khoe"

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 nhu minh khue") OR ("nguyen nhu minh khoe"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nguyen chi minh khai") OR ((("nguyen nhu minh khue") OR ("nguyen nhu minh khoe")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nguyen chi minh khai\") or (((\"nguyen nhu minh khue\") OR (\"nguyen nhu minh khoe\"))))".
• Removing quotes may allow a broader search: (( nguyen chi minh khai ) or ((( nguyen nhu minh khue ) OR ( nguyen nhu minh khoe )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen chi minh khai") or ((("nguyen nhu minh khue") OR ("nguyen nhu minh khoe"))))*.