Perhaps you should try some spelling variations:
"world bank chinese economists" » "world bank chinese economics", "world bank chinese economies", "world bank chinese economic", "world link chinese economists", "world task chinese economists", "world banking chinese economists"
"world bank chief economists" » "world bank chief economist", "world bank how economists", "world bank women economists"
"world beck chief economists" » "world beck chief economist", "world beck how economists", "world beck women economists", "world back chief economists", "world black chief economists", "world best chief economists"

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 ("world bank chinese economists"))) OR ("world beck chief economists")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"world bank chief economists\") OR (\"world bank chinese economists\"))) or (\"world beck chief economists\"))".
• Removing quotes may allow a broader search: (((( world bank chief economists ) OR ( world bank chinese economists ))) or ( world beck chief economists )).
• Adding a wildcard symbol may retrieve word variants: (((("world bank chief economists") OR ("world bank chinese economists"))) or ("world beck chief economists"))*.