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

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