Perhaps you should try some spelling variations:
"informationsmanager" » "informationstrager", "informationsmanagement", "informationsempfanger"
"informationsmangel" » "informationsmittel", "informationsempfanger", "informationsangebot"
"innovationsmanager" » "innovationsmanagement", "innovationsmanagements"

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 "innovationsmanager").
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"informationsmanager\" OR \"informationsmangel\") or \"innovationsmanager\")".
• Removing quotes may allow a broader search: (( informationsmanager OR informationsmangel ) or innovationsmanager ).
• Adding a wildcard symbol may retrieve word variants: (("informationsmanager" OR "informationsmangel") or "innovationsmanager")*.