Perhaps you should try some spelling variations:
australian politician » australian political, australian politics, australia political
robert neumann » robert norman, robert schumanns
robert hermann » norbert hermann, albert hermann, remmert hermann
robert lehmann » robert schumanns

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 neumann) OR (robert schumann))) OR (robert hermann))) OR (robert lehmann)) (australian politician).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((robert neumann) OR (robert schumann))) or (robert hermann))) or (robert lehmann)) (australian politician)".
• Adding a wildcard symbol may retrieve word variants: ((((((robert neumann) OR (robert schumann))) or (robert hermann))) or (robert lehmann)) (australian politician)*.