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 en politieke vernieuwing" » "studies en politiek vernieuwing", "studies en politique vernieuwing", "studies en politica vernieuwing", "studies ein politieke vernieuwing", "studies end politieke vernieuwing", "studies ex politieke vernieuwing"
"studies e politieke vernieuwing" » "studies e politiche vernieuwing", "studies e politik vernieuwing", "studies en politiek vernieuwing"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("studies over political vernieuwing") OR ((("studies e politieke vernieuwing") OR ("studies en politieke vernieuwing")))).
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