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