Perhaps you should try some spelling variations:
"information modell" » "information modelle", "information model", "information models"
"informatik modelle" » "information modelle", "geoinformatik modelle", "bioinformatik modelle", "informatic modele", "informatic modelse", "information modellee"
"informatik modell" » "informatic model", "informatic models", "information modelle"

You may be able to get more results by adjusting your search query.

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