Perhaps you should try some spelling variations:
informationen aktuelle » informationen visuelle, annotationen aktuelle, informatik aktuelle
informative models » information models, normative models, informatique modeles
informatik modell » information modell, informatic model, informatic models

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: (("((informationen aktuelle) or (((informatik modell) or (informative models))))") OR ("((informationen aktuelle) or (((informatik modell) or (informative models))))e")).
• Removing quotes may allow a broader search: (( ((informationen aktuelle) or (((informatik modell) or (informative models)))) ) or ( ((informationen aktuelle) or (((informatik modell) or (informative models))))e )).
• Adding a wildcard symbol may retrieve word variants: (("((informationen aktuelle) or (((informatik modell) or (informative models))))") or ("((informationen aktuelle) or (((informatik modell) or (informative models))))e"))*.