Perhaps you should try some spelling variations:
"social network" » "social networks"
"social work's" » "social workers", "social worlds", "social worker"
"social works" » "social workers", "social worlds", "social worker"
"social worka" » "social worker", "social workup", "social world"

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 network") OR ("social work"))) OR ((((("social works") OR ("social work's"))) OR ("social worka")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"social network\") or (\"social work\"))) or (((((\"social works\") OR (\"social work's\"))) or (\"social worka\"))))".
• Removing quotes may allow a broader search: (((( social network ) or ( social work ))) or ((((( social works ) OR ( social work's ))) or ( social worka )))).
• Adding a wildcard symbol may retrieve word variants: (((("social network") or ("social work"))) or ((((("social works") OR ("social work's"))) or ("social worka"))))*.