Perhaps you should try some spelling variations:
employee » employed
employees » employeds
co-operatings" » co-operating", co-operationes", co-operaticas"
co-cooperative" » co-cooperation"

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: "((\"(employee or employees)-ownership & (co-operatings\" OR (co-operation\" or co-cooperative\"))) OR (\"(employee or employees)-ownership & co-operations\"))".
• Removing quotes may allow a broader search: (( (employee or employees)-ownership & (co-operatings OR (co-operation or co-cooperative ))) OR ( (employee or employees)-ownership & co-operations )).
• Adding a wildcard symbol may retrieve word variants: (("(employee or employees)-ownership & (co-operatings" OR (co-operation" or co-cooperative"))) OR ("(employee or employees)-ownership & co-operations"))*.