Perhaps you should try some spelling variations:
"nguyen chi minh chau" » "nguyen thi minh chau", "nguyen can minh chau", "nguyen nhu minh chau", "nguyen chi tinh chat"
"nguyen huu minh pham" » "nguyen duc minh pham", "nguyen huu dinh phap", "nguyen huu minh khai", "nguyen huu minh thao", "nguyen huu dinh pham", "nguyen huu manh pham", "nguyen huu binh 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 huu 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 huu minh pham") OR ("nguyen van binh chi")))).
• Removing quotes may allow a broader search: (( nguyen chi minh chau ) or ((( nguyen huu minh pham ) or ( nguyen van binh chi )))).
• Adding a wildcard symbol may retrieve word variants: (("nguyen chi minh chau") or ((("nguyen huu minh pham") or ("nguyen van binh chi"))))*.