Perhaps you should try some spelling variations:
"geoinformation modellee" » "geoinformatik modelle", "geoinformation models", "information modelle", "geoinformation modelleee", "geoinformation modelee", "geoinformation modelsee"
"information modell" » "information modelle", "information model", "information models"
"informatik modell" » "informatic models", "information modelle", "information models"
"informatic model" » "informatic models", "information model", "informative model"

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