Perhaps you should try some spelling variations:
employee » employed
employees » employeds
employeds » employed, employers, employes
co-operatives" » co-cooperatives", co-imperatives", co-operatings"
co-operativen" » co-cooperativen", co-operatingn"
co-operative" » co-cooperative", co-operating"

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: (("(employee OR (employeds OR employees))-ownership & (co-operatives" or ((co-operativen" OR co-operative") or co-operation"))) OR ("(employee or (employeds or employees))-ownership & co-operations")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"(employee or (employeds or employees))-ownership & (co-operatives\" or ((co-operativen\" OR co-operative\") or co-operation\"))) or (\"(employee or (employeds or employees))-ownership & co-operations\"))".
• Removing quotes may allow a broader search: (( (employee or (employeds or employees))-ownership & (co-operatives or ((co-operativen OR co-operative ) or co-operation ))) or ( (employee or (employeds or employees))-ownership & co-operations )).
• Adding a wildcard symbol may retrieve word variants: (("(employee or (employeds or employees))-ownership & (co-operatives" or ((co-operativen" OR co-operative") or co-operation"))) or ("(employee or (employeds or employees))-ownership & co-operations"))*.