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

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