Perhaps you should try some spelling variations:
"harvard world war studies books series." » "harvard cold war studies books series.", "harvard world war studies book series.", "harvard world war studies booklet series.", "harvard world war student books series.", "harvard world war studies books strips.", "harvard world war stories books series.", "harvard world early studies books series."
"harvard world bank studies firm survey." » "harvard cold bank studies firm survey.", "harvard world urban studies firm survey.", "harvard world bank study firm survey.", "harvard world bank studies from survey.", "harvard world bank studies confirm survey.", "harvard world bank studies figure survey."

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