Perhaps you should try some spelling variations:
"harvard world urban studies book series." » "harvard world urban studies from series.", "harvard world ran studies book series."
"harvard world war studies fuel sources." » "harvard world war studies from sources.", "harvard world war studies food sources.", "harvard world war studies led sources.", "harvard world war studies fuel source.", "harvard world case studies fuel sources.", "harvard world bank studies fuel sources."

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 urban studies book series.") OR ("harvard world war studies fuel sources."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard world urban studies book series.\") OR (\"harvard world war studies fuel sources.\"))*".
• Removing quotes may allow a broader search: (( harvard world urban studies book series. ) OR ( harvard world war studies fuel sources. ))*.