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

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