Perhaps you should try some spelling variations:
"informatic modelse" » "informatic model", "information modelle", "information models", "informatic modele", "information modelse", "informative modelse"
"informatic models" » "informatic model", "information models", "informative models"
"geoinformatik modelle" » "geoinformatik modell"

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: (("informatic models") OR ((("informatic modelse") OR ("geoinformatik modelle")))).
• Removing quotes may allow a broader search: (( informatic models ) or ((( informatic modelse ) or ( geoinformatik modelle )))).
• Adding a wildcard symbol may retrieve word variants: (("informatic models") or ((("informatic modelse") or ("geoinformatik modelle"))))*.