Perhaps you should try some spelling variations:
"harvard cold war studies from surveys." » "harvard cold war studies from survey.", "harvard cold war studies firm surveys.", "harvard cold war studies force surveys.", "harvard cold war stories from surveys.", "harvard cold early studies from surveys."
"harvard world 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."

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