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 khue", "nguyen chi minh chau", "nguyen chi minh pham"
"nguyen nhu minh khai" » "nguyen thi minh khai", "nguyen huu minh khai", "nguyen huy minh khai", "nguyen nhu minh khue", "nguyen nhu minh chau", "nguyen nhu minh pham", "nguyen thu minh khai", "nguyen nhu binh khai", "nguyen phu minh khai"
"nguyen nhu minh chi" » "nguyen thi minh chi", "nguyen huu minh chi", "nguyen huy minh chi", "nguyen thu minh chi", "nguyen nhu binh chi", "nguyen phu minh chi", "nguyen nhu dinh chi", "nguyen nhu linh chi", "nguyen nhu minh chau"

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