Perhaps you should try some spelling variations:
"social network" » "social networks", "social netyork"
"social metwork" » "social networks", "social petworks", "social netword", "social metworks", "social metyork"
"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 network") OR ("social metwork"))) OR ("social work")).
• Removing quotes may allow a broader search: (((( social network ) or ( social metwork ))) or ( social work )).
• Adding a wildcard symbol may retrieve word variants: (((("social network") or ("social metwork"))) or ("social work"))*.