Perhaps you should try some spelling variations:
zur islamforschung » zur raumforschung, zur feldforschung, zur genomforschung
essen beitrage » essener beitrage, wissen beitrage, wissens beitrage
dialogforschung » dialektforschung

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: essen beitrage ((zur islamforschung) OR (zur dialogforschung)).
• Adding a wildcard symbol may retrieve word variants: essen beitrage ((zur islamforschung) or (zur dialogforschung))*.