Perhaps you should try some spelling variations:
"spanish colonial workers' party" » "british colonial workers' party", "spanish colonial borders' party", "spanish colonial powers' party", "spanish colonial worlds' party"
"spanish social work' party" » "polish social work' party", "swedish social work' party"

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: (("spanish social work' party") OR ("spanish colonial workers' party")).
• Removing quotes may allow a broader search: (( spanish social work' party ) or ( spanish colonial workers' party )).
• Adding a wildcard symbol may retrieve word variants: (("spanish social work' party") or ("spanish colonial workers' party"))*.