Perhaps you should try some spelling variations:
"nguyen xuan kinh thuy" » "nguyen van kinh thuy", "nguyen xuan dinh thuy", "nguyen qua kinh thuy", "nguyen than kinh thuy", "nguyen xuan minh thuy", "nguyen xuan kinh thuc"
"nguyen thi minh khoe" » "nguyen thi minh khue", "nguyen thi minh khoi", "nguyen thi minh hoa", "nguyen chi minh khoe", "nguyen thi bich khoe"
"nguyen thi hanh khoe" » "nguyen thi hang khoa", "nguyen thi anh khoa", "nguyen thi hanh hoa", "nguyen thi thanh khoe"

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 kinh thuy") OR ((("nguyen thi minh khoe") OR ("nguyen thi hanh khoe"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"nguyen xuan kinh thuy\") or (((\"nguyen thi minh khoe\") OR (\"nguyen thi hanh khoe\"))))~".
• Removing quotes may allow a broader search: (( nguyen xuan kinh thuy ) or ((( nguyen thi minh khoe ) OR ( nguyen thi hanh khoe ))))~.
• Adding a wildcard symbol may retrieve word variants: (("nguyen xuan kinh thuy") or ((("nguyen thi minh khoe") OR ("nguyen thi hanh khoe"))))*.