Perhaps you should try some spelling variations:
"social network's" » "social networks", "social networkers", "social networking", "social networks's", "social netyork's"
"social netyorks" » "social networks", "social petworks", "social networkers"
"social work" » "social works", "social york"

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