Perhaps you should try some spelling variations:
political scientists » political science
political sciences » political science, clinical sciences, biological sciences
social scientists » social sciences
mark webber » mark weber, mr webber, mark weiser

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