Perhaps you should try some spelling variations:
"studie der pisa schools of governance" » "studie der his schools of governance", "studie der lima schools of governance", "studie der high schools of governance", "studie der pa schools of governance", "studie der pisa schocks of governance", "studie der cimpa schools of governance", "studium der pisa schools of governance"
"studien der _ school of governance" » "studenten der _ school of governance"
"studie der pisa school of governance" » "studie der pa school of governance", "studie der pisa schock of governance", "studie der cimpa school of governance", "studium der pisa school of governance"

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: (("studien der _ school of governance") OR ((("studie der pisa school of governance") OR ("studie der pisa schools of governance")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"studien der _ school of governance\") or (((\"studie der pisa school of governance\") OR (\"studie der pisa schools of governance\"))))".
• Removing quotes may allow a broader search: (( studien der _ school of governance ) or ((( studie der pisa school of governance ) OR ( studie der pisa schools of governance )))).
• Adding a wildcard symbol may retrieve word variants: (("studien der _ school of governance") or ((("studie der pisa school of governance") OR ("studie der pisa schools of governance"))))*.