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