Perhaps you should try some spelling variations:
thomas stephenson » thomas stephen, thomas stephanie, thomas stevens
trade unionist » trade unionists, trades unionist, trade unionism
_ stephenson » l stephenson, a stephenson, b stephenson

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: ((thomas stephenson) OR (_ stephenson)) (trade unionist).
• Adding a wildcard symbol may retrieve word variants: ((thomas stephenson) or (_ stephenson)) (trade unionist)*.