Perhaps you should try some spelling variations:
"information modelle" » "information modell", "information model", "information models"
"informatik modelle" » "geoinformatik modelle", "bioinformatik modelle", "informatic model", "information modelle", "informatic modele", "informatic modelse"
"informatik modell" » "information modell", "informatic model", "informatic 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: (("informatik modell") OR ((((("informatik modelle") OR ("information modelle"))) OR ("information modelle")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"informatik modell\") or (((((\"informatik modelle\") OR (\"information modelle\"))) or (\"information modelle\"))))".
• Removing quotes may allow a broader search: (( informatik modell ) or ((((( informatik modelle ) OR ( information modelle ))) or ( information modelle )))).
• Adding a wildcard symbol may retrieve word variants: (("informatik modell") or ((((("informatik modelle") OR ("information modelle"))) or ("information modelle"))))*.