Perhaps you should try some spelling variations:
"nguyen chi minh khai" » "nguyen can minh khai", "nguyen nhu minh khai", "nguyen hai minh khai", "nguyen chi minh chau", "nguyen chi minh chi", "nguyen chi minh thao"
"nguyen chi minh khue" » "nguyen can minh khue", "nguyen nhu minh khue", "nguyen hai minh khue"
"nguyen thi minh pham" » "nguyen thi minh chau", "nguyen thi dinh phap", "nguyen thi minh thao", "nguyen thi hanh pham", "nguyen thi bich pham"

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