Perhaps you should try some spelling variations:
studien der » studie der, studenten der
studien die » studie die
said school » said schools, based school
mac school » c school, sic school, music school

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) OR (studien die)) said school of governance ) OR ( ((studien der) OR (studien die)) mac school of governance )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((studien der) OR (studien die)) said school of governance ) or ( ((studien der) OR (studien die)) mac school of governance ))".
• Adding a wildcard symbol may retrieve word variants: (( ((studien der) OR (studien die)) said school of governance ) or ( ((studien der) OR (studien die)) mac school of governance ))*.