Perhaps you should try some spelling variations:
informationen aktuelle » informationen visuelle, annotationen aktuelle, informatik aktuelle
"informatik aktuell" » "informatik aktuelle", "informatik kulturelle"
"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: (((("informatik aktuell") OR ("informatik modell"))) OR ("((informatik akademie) or (informationen aktuelle))")).
• Removing quotes may allow a broader search: (((( informatik aktuell ) or ( informatik modell ))) or ( ((informatik akademie) or (informationen aktuelle)) )).
• Adding a wildcard symbol may retrieve word variants: (((("informatik aktuell") or ("informatik modell"))) or ("((informatik akademie) or (informationen aktuelle))"))*.