Perhaps you should try some spelling variations:
"informatik modell" » "information modell", "informatic models", "information modelle"
"geoinformatik modelle" » "geoinformation modelle", "geoinformatic modelse", "geoinformation modellee"
"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 ((("informatic model") OR ("geoinformatik modelle")))).
• Removing quotes may allow a broader search: (( informatik modell ) or ((( informatic model ) or ( geoinformatik modelle )))).
• Adding a wildcard symbol may retrieve word variants: (("informatik modell") or ((("informatic model") or ("geoinformatik modelle"))))*.