Perhaps you should try some spelling variations:
"nguyen xuan minh khai" » "nguyen van minh khai", "nguyen xuan dinh khai", "nguyen xuan kinh khai", "nguyen quang minh khai", "nguyen xuan minh chau", "nguyen xuan minh chi", "nguyen xuan minh pham"
"nguyen ban minh khue" » "nguyen bang minh khue", "nguyen van minh khue", "nguyen can minh khue", "nguyen ban tinh khue", "nguyen ban linh khue"
"nguyen thi minh khai" » "nguyen thi minh chau", "nguyen thi minh chi", "nguyen thi minh pham", "nguyen chi minh khai", "nguyen thi hanh khai", "nguyen thi bich khai"

You may be able to get more results by adjusting your search query.

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