Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen thi minh khai", "nguyen can minh khai", "nguyen thu minh khai", "nguyen chi minh chau", "nguyen chi minh chi", "nguyen chi minh pham"
"nguyen hai minh khai" » "nguyen thi minh khai", "nguyen van minh khai", "nguyen huu minh khai", "nguyen hai minh chau", "nguyen hai minh chi", "nguyen hai minh pham", "nguyen khai minh khai", "nguyen thai minh khai", "nguyen hai linh khai"
"nguyen nhu minh khue" » "nguyen thi minh khue", "nguyen huu minh khue", "nguyen huy minh khue", "nguyen thu minh khue", "nguyen nhu binh khue", "nguyen phu minh khue", "nguyen nhu minh hue", "nguyen nhu minh khu", "nguyen nhu minh khoe"

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 hai minh khai"))) or ("nguyen nhu minh khue"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen chi minh khai") OR ("nguyen hai minh khai"))) OR ("nguyen nhu minh khue")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nguyen chi minh khai\") OR (\"nguyen hai minh khai\"))) or (\"nguyen nhu minh khue\"))".
• Removing quotes may allow a broader search: (((( nguyen chi minh khai ) OR ( nguyen hai minh khai ))) or ( nguyen nhu minh khue )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen chi minh khai") OR ("nguyen hai minh khai"))) or ("nguyen nhu minh khue"))*.