Perhaps you should try some spelling variations:
"social network's" » "social networkers", "social networking", "societal networks", "social networks's"
"social york" » "social worka", "social you", "social your"
"social work" » "social works"
"social networks" » "social networkss"

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