Perhaps you should try some spelling variations:
"harvard world war studies book series." » "harvard cold war studies book series.", "harvard world war stories book series.", "harvard world early studies book series.", "harvard world war studies books series.", "harvard world war studies ebook series."
"harvard world war studies from service." » "harvard cold war studies from service.", "harvard world war studies from serbia.", "harvard world war stories from service.", "harvard world early studies from service."

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 book series.") OR ("harvard world war studies from service."))~.
• Removing quotes may allow a broader search: (( harvard world war studies book series. ) or ( harvard world war studies from service. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies book series.") or ("harvard world war studies from service."))*.