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 nhu dinh phap" » "nguyen thi dinh phap", "nguyen huu dinh phap", "nguyen huy dinh phap", "nguyen nhu danh phap", "nguyen nhu trinh phap", "nguyen nhu dinh chau", "nguyen chu dinh phap", "nguyen nhu binh phap", "nguyen nhu minh phap"
"nguyen nhu linh chi" » "nguyen thi linh chi", "nguyen huu linh chi", "nguyen huy linh chi", "nguyen nhu binh chi", "nguyen nhu minh chi", "nguyen thuy linh chi", "nguyen nhu dinh chi", "nguyen nhu linh chinh"

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