Perhaps you should try some spelling variations:
"betrieblichen gesundheitsmanagements" » "betriebliches gesundheitsmanagement", "betriebliches gesundheitsmanagements", "betrieblichen gesundheitsforderungs"
"betrieblichen gesundheitsmanagement" » "betriebliches gesundheitsmanagement", "betrieblichen gesundheitsforderung"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"betrieblichen gesundheitsmanagement\") OR (\"betrieblichen gesundheitsmanagements\"))*".
• Removing quotes may allow a broader search: (( betrieblichen gesundheitsmanagement ) OR ( betrieblichen gesundheitsmanagements ))*.