Perhaps you should try some spelling variations:
harvard world » harvard cold
bank studies » urban studies, bank study
studies firm » studies confirm, studies figure, studies formal
firm surveys » firm survey
war studies » war stories, early studies
from series » rom series, from services, forum series

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 war studies from series. ) OR ( harvard world bank studies firm surveys. ))~.
• Adding a wildcard symbol may retrieve word variants: (( harvard world war studies from series. ) or ( harvard world bank studies firm surveys. ))*.