Perhaps you should try some spelling variations:
harvard world » harvard cold
call studies » scale studies, local studies, dalit studies
harvard col » harvard cold, harvard camp, harvard home
from series » rom series, from services, forum series
study book » studies book
col call » cold call

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 study book series. ) OR ( harvard col call studies from series. ))~.
• Adding a wildcard symbol may retrieve word variants: (( harvard world bank study book series. ) or ( harvard col call studies from series. ))*.