Perhaps you should try some spelling variations:
clinical scientist » clinical scientific, clinical sciences, political scientists
mark webber » mark weiser, mark yeber, mark western
mark weber » marx weber, mark yeber, maria weber
mr webber » mr webbe, mr webber's, mr webster

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: ((((mark webber) OR (mr webber))) OR (mark weber)) (clinical scientist).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((mark webber) OR (mr webber))) or (mark weber)) (clinical scientist)".
• Adding a wildcard symbol may retrieve word variants: ((((mark webber) OR (mr webber))) or (mark weber)) (clinical scientist)*.