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

You may be able to get more results by adjusting your search query.

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