Perhaps you should try some spelling variations:
robert schumanns » robert schumann, robert schuman, robert neumann
robert lehmann » robert hermann, robert neumann, robert schumann
robert norman » robert surman, robert norton, robert hermann
footballer » footballers, football

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: ((robert norman) OR (((robert lehmann) OR (robert schumanns)))) (footballer).
• Adding a wildcard symbol may retrieve word variants: ((robert norman) or (((robert lehmann) or (robert schumanns)))) (footballer)*.