Perhaps you should try some spelling variations:
"nguyen can minh khue" » "nguyen van minh khue", "nguyen xuan minh khue", "nguyen cong minh khue", "nguyen ban minh khue", "nguyen dan minh khue"
"nguyen cao minh khue" » "nguyen cay minh khue", "nguyen bao minh khue", "nguyen van minh khue", "nguyen chi minh khue"
"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 can minh khue") OR ("nguyen cao minh khue"))) or ("nguyen thi hanh khai"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nguyen can minh khue") OR ("nguyen cao minh khue"))) OR ("nguyen thi hanh khai")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"nguyen can minh khue\") OR (\"nguyen cao minh khue\"))) or (\"nguyen thi hanh khai\"))".
• Removing quotes may allow a broader search: (((( nguyen can minh khue ) OR ( nguyen cao minh khue ))) or ( nguyen thi hanh khai )).
• Adding a wildcard symbol may retrieve word variants: (((("nguyen can minh khue") OR ("nguyen cao minh khue"))) or ("nguyen thi hanh khai"))*.