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