Perhaps you should try some spelling variations:
"informationsmangel" » "informationsmanager", "informationsangebot", "informationsmodell"
"informationsempfanger" » "informationsmanager", "informationstrager"
"informationsmittel" » "informationsmodell", "informationsmaterial"

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: ("informationsmangel" OR ("informationsempfanger" OR "informationsmittel")).
• Removing quotes may allow a broader search: ( informationsmangel or ( informationsempfanger or informationsmittel )).
• Adding a wildcard symbol may retrieve word variants: ("informationsmangel" or ("informationsempfanger" or "informationsmittel"))*.