Perhaps you should try some spelling variations:
"studies over political vernieuwing" » "studies over political interviewing", "studies other political vernieuwing", "studies power political vernieuwing", "studies order political vernieuwing", "studies novel political vernieuwing"
"studies overview political vernieuwing" » "studies overview political interviewing", "studies overviewthe political vernieuwing", "studies overview clinical vernieuwing", "studies overview optical vernieuwing", "study overview political vernieuwing", "services overview political vernieuwing", "issues overview political vernieuwing", "studies novelview political vernieuwing", "studies otherview political vernieuwing"
"studies over positive vernieuwing" » "studies over positive veranderung", "studies other positive vernieuwing", "studies oder positiver vernieuwing", "studies der positive vernieuwing", "studies novel positive vernieuwing"
"studies over politieke vernieuwing" » "studies over policies vernieuwing", "studies en politieke vernieuwing", "studies novel politieke vernieuwing", "studies other politieke vernieuwing"

Try widening your search to All Fields.

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: (((("studies over politieke vernieuwing") OR ("studies over positive vernieuwing"))) OR ((("studies over political vernieuwing") OR ("studies overview political vernieuwing")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"studies over politieke vernieuwing\") or (\"studies over positive vernieuwing\"))) or (((\"studies over political vernieuwing\") OR (\"studies overview political vernieuwing\"))))".
• Removing quotes may allow a broader search: (((( studies over politieke vernieuwing ) or ( studies over positive vernieuwing ))) or ((( studies over political vernieuwing ) OR ( studies overview political vernieuwing )))).
• Adding a wildcard symbol may retrieve word variants: (((("studies over politieke vernieuwing") or ("studies over positive vernieuwing"))) or ((("studies over political vernieuwing") OR ("studies overview political vernieuwing"))))*.