Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen can minh khai", "nguyen hai minh khai", "nguyen thu minh khai", "nguyen chi minh khue", "nguyen chi minh chau", "nguyen chi minh chi"
"nguyen nhu minh pham" » "nguyen huu minh pham", "nguyen huy minh pham", "nguyen tu minh pham", "nguyen nhu minh chau", "nguyen nhu dinh phap", "nguyen nhu minh thao", "nguyen thu minh pham", "nguyen nhu binh pham", "nguyen phu minh pham"
"nguyen thi binh chi" » "nguyen thai binh chi", "nguyen thi bich chi", "nguyen thi minh chi", "nguyen thi dinh chi", "nguyen thi linh chi"

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 pham") or ("nguyen thi binh chi"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nguyen chi minh khai") OR ((("nguyen nhu minh pham") OR ("nguyen thi binh chi")))).
• Removing quotes may allow a broader search: (( nguyen chi minh khai ) or ((( nguyen nhu minh pham ) or ( nguyen thi binh chi )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen chi minh khai") or ((("nguyen nhu minh pham") or ("nguyen thi binh chi"))))*.