Perhaps you should try some spelling variations:
"fir+bzw forschung fur die praxis" » "fir+gw forschung fur die praxis", "fir+cscw forschung fur die praxis", "fire+bzw forschung fur die praxis"
"firm+bzw forschung fur die praxis" » "firm+gw forschung fur die praxis", "firm+cscw forschung fur die praxis", "firem+bzw forschung fur die praxis"

Try widening your search to All Fields.

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: "((\"fir+bzw forschung fur die praxis\") OR (\"firm+bzw forschung fur die praxis\"))".
• Removing quotes may allow a broader search: (( fir+bzw forschung fur die praxis ) OR ( firm+bzw forschung fur die praxis )).
• Adding a wildcard symbol may retrieve word variants: (("fir+bzw forschung fur die praxis") OR ("firm+bzw forschung fur die praxis"))*.