Perhaps you should try some spelling variations:
studies books » studies book, studies booklet, student books
books series » book series, books strips, booklet series
five studies » ripe studies, die studies, five stories
from service » from serbia
world case » world class
cold five » cold wave, role five

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( harvard world case studies books series. ) or ( harvard cold five studies from service. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( harvard world case studies books series. ) OR ( harvard cold five studies from service. )).
• Adding a wildcard symbol may retrieve word variants: (( harvard world case studies books series. ) or ( harvard cold five studies from service. ))*.