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

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 modell ) OR ( information modell ))) OR ((( informatic model ) OR ( geoinformatik modelle )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( informatik modell ) OR ( information modell ))) or ((( informatic model ) or ( geoinformatik modelle ))))".
• Adding a wildcard symbol may retrieve word variants: (((( informatik modell ) OR ( information modell ))) or ((( informatic model ) or ( geoinformatik modelle ))))*.