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", "firm+bzw forschung fur die praxis"
"fire+bzw forschung fur die praxis" » "fire+gw forschung fur die praxis", "fire+cscw forschung fur die praxis", "firme+bzw forschung fur die praxis"

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 (\"fire+bzw forschung fur die praxis\"))*".
• Removing quotes may allow a broader search: (( fir+bzw forschung fur die praxis ) OR ( fire+bzw forschung fur die praxis ))*.