Perhaps you should try some spelling variations:
diesen beitragen » dieses beitrages, dieser beitrage, den beitragen
segner beitrage » seiner beitrage, essener beitrage, neuer 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: ((segner beitrage) OR (diesen beitragen)) zur dialogforschung.
• Adding a wildcard symbol may retrieve word variants: ((segner beitrage) or (diesen beitragen)) zur dialogforschung*.