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 board case studies from sources." » "harvard cold case studies from sources.", "harvard board cab studies from sources.", "harvard hard case studies from sources.", "harvard board crises studies from sources."

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 urban studies book series.") OR ("harvard board case studies from sources."))~.
• Removing quotes may allow a broader search: (( harvard world urban studies book series. ) or ( harvard board case studies from sources. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard world urban studies book series.") or ("harvard board case studies from sources."))*.