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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "essener beitrage ((zur islamforschung) OR (zur dialogforschung))".
• Adding a wildcard symbol may retrieve word variants: essener beitrage ((zur islamforschung) OR (zur dialogforschung))*.