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

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