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

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