Perhaps you should try some spelling variations:
"social works" » "social work's", "social worlds", "social worker", "social yorks"
"social worka" » "social worker", "social work's", "social workup", "social yorka"
"social work" » "social york"
"social workers" » "social yorkers"

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