Perhaps you should try some spelling variations:
"informatik modelle" » "information modelle", "bioinformatik modelle", "informatic model", "informatic modele", "information modellee"
"geoinformatik modelle" » "geoinformation modelle", "geobioinformatik modelle", "geoinformatic model", "geoinformatic modele", "geoinformation modellee"
"informatik modell" » "information modell", "informatic model", "information modelle"
"informatic modele" » "informatic model", "information modeler", "information modelle"
"informatic models" » "informatic model", "information models", "informative models"

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