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 surveys." » "harvard cold war studies from surveys.", "harvard world war studies from survey.", "harvard world war studies firm surveys.", "harvard world war studies force surveys.", "harvard world war stories from surveys.", "harvard world early studies from surveys."

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