Perhaps you should try some spelling variations:
harvard world » harvard cold
bank studies » urban studies, bank study
harvard bond » harvard cold, harvard home
studies firm » studies from, studies confirm, studies figure
studies led » studies leiden, studies list, studies lars
led surveys » lek surveys, land surveys, re surveys
bond bank » blood bank, land bank, bad bank

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: (( harvard world bank studies led surveys. ) OR ( harvard bond bank studies firm survey. ))~.
• Adding a wildcard symbol may retrieve word variants: (( harvard world bank studies led surveys. ) or ( harvard bond bank studies firm survey. ))*.