Perhaps you should try some spelling variations:
wiener beitrage » dieser beitrage, eigenes beitrage, essener beitrage
dieser beitrag » dieses beitrages, der beitrag
dialektforschung" » marktforschung", begleitforschung", impaktforschung"

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: "((wiener beitrage) OR (dieser beitrag)) zur (dialogforschung" OR dialektforschung").
• Removing quotes may allow a broader search: ((wiener beitrage) or (dieser beitrag)) zur (dialogforschung OR dialektforschung ).
• Adding a wildcard symbol may retrieve word variants: "((wiener beitrage) or (dieser beitrag)) zur (dialogforschung" OR dialektforschung")*.