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

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