Perhaps you should try some spelling variations:
thomas stephenson » thomas stephen, thomas stephanie, thomas stevens
s.m stephenson » wm stephenson, l stephenson, _ stephenson
trade unionist » trade unionists, trades unionist, trade unionism

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