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"))*.