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 chi"
"nguyen phu minh pham" » "nguyen phuc minh pham", "nguyen thu minh pham", "nguyen thuy minh pham", "nguyen phu minh chau", "nguyen phu dinh phap", "nguyen phu minh thao", "nguyen phu ninh pham", "nguyen phu tinh pham"
"nguyen nhu binh chi" » "nguyen thi binh chi", "nguyen huu binh chi", "nguyen huy binh chi", "nguyen nhu minh chi", "nguyen thu binh chi", "nguyen thuy binh chi", "nguyen nhu dinh chi", "nguyen nhu 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 phu minh pham") or ("nguyen nhu binh chi"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nguyen chi minh khai") OR ((("nguyen phu minh pham") OR ("nguyen nhu binh chi")))).
• Removing quotes may allow a broader search: (( nguyen chi minh khai ) or ((( nguyen phu minh pham ) or ( nguyen nhu binh chi )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen chi minh khai") or ((("nguyen phu minh pham") or ("nguyen nhu binh chi"))))*.