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 urban studies firm surveys." » "harvard cold urban studies firm surveys.", "harvard world urban studies from surveys.", "harvard world urban studies confirm surveys.", "harvard world urban studies figure surveys.", "harvard world urban studies firm survey.", "harvard worst urban studies firm surveys."

Try widening your search to All Fields.

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 war studies book series.") or ("harvard world urban studies firm surveys."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world war studies book series.") OR ("harvard world urban studies firm surveys.")).
• Removing quotes may allow a broader search: (( harvard world war studies book series. ) or ( harvard world urban studies firm surveys. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world war studies book series.") or ("harvard world urban studies firm surveys."))*.