Perhaps you should try some spelling variations:
"social reproduction" » "sexual reproduction"
"social revolution" » "social evolution", "digital revolution", "social recognition"
"social regulation" » "social relations", "social simulation", "capital regulation"

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: (((("social revolution") OR ("social regulation"))) OR ("social reproduction")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"social revolution\") OR (\"social regulation\"))) or (\"social reproduction\"))".
• Removing quotes may allow a broader search: (((( social revolution ) OR ( social regulation ))) or ( social reproduction )).
• Adding a wildcard symbol may retrieve word variants: (((("social revolution") OR ("social regulation"))) or ("social reproduction"))*.