Perhaps you should try some spelling variations:
employee » employees, employed
employeds » employees, employed, employers
co-operatives" » co-operative", co-cooperatives", co-imperatives"
co-operativen" » co-operative", co-operation"

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)-ownership & (co-operatives" OR co-operativen")) OR ("(employee or employeds)-ownership & co-operations")).
• Removing quotes may allow a broader search: (( (employee or employeds)-ownership & (co-operatives OR co-operativen )) or ( (employee or employeds)-ownership & co-operations )).
• Adding a wildcard symbol may retrieve word variants: (("(employee or employeds)-ownership & (co-operatives" OR co-operativen")) or ("(employee or employeds)-ownership & co-operations"))*.