Perhaps you should try some spelling variations:
"polish posted workers' party" » "polish exposed workers' party", "polish based workers' party", "polish post workers' party", "polish listed workers' party", "polish united workers' party"
"polish system workers' party" » "polish systems workers' party", "polish system worker' party", "polish system works' party", "policy system workers' party", "police system workers' party", "parish system workers' party"

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: "((\"polish posted workers' party\") OR (\"polish system workers' party\"))".
• Removing quotes may allow a broader search: (( polish posted workers' party ) OR ( polish system workers' party )).
• Adding a wildcard symbol may retrieve word variants: (("polish posted workers' party") OR ("polish system workers' party"))*.