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