Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen can minh khai", "nguyen hai minh khai", "nguyen thu minh khai", "nguyen chi minh khue", "nguyen chi minh chau", "nguyen chi minh chi"
"nguyen nhu minh khai" » "nguyen huu minh khai", "nguyen huy minh khai", "nguyen tu minh khai", "nguyen nhu minh khue", "nguyen nhu minh chau", "nguyen nhu minh chi", "nguyen thu minh khai", "nguyen nhu binh khai", "nguyen phu minh khai"
"nguyen thi hanh khai" » "nguyen thi manh khai", "nguyen thi nhanh thai", "nguyen thi thanh hai", "nguyen thi thanh khai"

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