Perhaps you should try some spelling variations:
chief economists » chief economist, women economists, can economists
modern economic » models economic, modern economy, modeling economic
how economists » how economics, _ economists, how economic
beck modern » beck oder, rock modern, became modern
world beck » world back, world black, world best

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: (( world bank ((chief economists) OR (how economists)) ) OR ( world beck modern economic ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( world bank ((chief economists) OR (how economists)) ) or ( world beck modern economic ))*".