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

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: (("informatic model") OR ((("informatik modelle") OR ("information model")))).
• Removing quotes may allow a broader search: (( informatic model ) or ((( informatik modelle ) or ( information model )))).
• Adding a wildcard symbol may retrieve word variants: (("informatic model") or ((("informatik modelle") or ("information model"))))*.