Perhaps you should try some spelling variations:
"socialist political returns" » "socialism political returns", "socialist politics returns", "social political returns", "socialist political remarks", "socialist political reasons", "socialist political reforms"
"specialist period returns" » "socialist period returns", "special period returns", "specialist species returns", "specialist periodical returns"

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: "((\"socialist political returns\") OR (\"specialist period returns\"))".
• Removing quotes may allow a broader search: (( socialist political returns ) OR ( specialist period returns )).
• Adding a wildcard symbol may retrieve word variants: (("socialist political returns") OR ("specialist period returns"))*.