Perhaps you should try some spelling variations:
informatik aktuell » informatik aktuelle, informationen aktuelle, informatik kulturelle
informatik modell » information modell, informatic model, informatic models
information model » information modeling

Try widening your search to All Fields.

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: (("((((informatik aktuell) OR (informatik modell))) or (information model))") OR ("((((informatik aktuell) OR (informatik modell))) or (information model))e")).
• Removing quotes may allow a broader search: (( ((((informatik aktuell) OR (informatik modell))) or (information model)) ) or ( ((((informatik aktuell) OR (informatik modell))) or (information model))e )).
• Adding a wildcard symbol may retrieve word variants: (("((((informatik aktuell) OR (informatik modell))) or (information model))") or ("((((informatik aktuell) OR (informatik modell))) or (information model))e"))*.