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