Perhaps you should try some spelling variations:
"harvard world urban studies book series." » "harvard cold urban studies book series.", "harvard worst urban studies book series.", "harvard world urban studies books series.", "harvard world urban studies ebook series."
"harvard bond case studies from sources." » "harvard cold case studies from sources.", "harvard home case studies from sources.", "harvard bond cash studies from sources.", "harvard blind case studies from sources.", "harvard board case studies from 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 bond case studies from sources."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world urban studies book series.") OR ("harvard bond case studies from sources."))*.
• Removing quotes may allow a broader search: (( harvard world urban studies book series. ) or ( harvard bond case studies from sources. ))*.