Perhaps you should try some spelling variations:
"informationsmanager" » "innovationsmanager", "informationstrager", "informationsmanagement"
"informationsempfanger" » "informationstrager"
"informationsmangel" » "informationsangebot", "informationsmodell", "informationsmedien"
"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: ("informationsmanager" OR ("informationsempfanger" OR ("informationsmangel" OR "informationsmittel"))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(\"informationsmanager\" or (\"informationsempfanger\" or (\"informationsmangel\" OR \"informationsmittel\")))".
• Removing quotes may allow a broader search: ( informationsmanager or ( informationsempfanger or ( informationsmangel OR informationsmittel ))).
• Adding a wildcard symbol may retrieve word variants: ("informationsmanager" or ("informationsempfanger" or ("informationsmangel" OR "informationsmittel")))*.