Perhaps you should try some spelling variations:
"social works" » "social work's", "social worka", "social workers", "social yorks"
"social network" » "social netyork"
"social work" » "social york"
"social networks" » "social netyorks"

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