Perhaps you should try some spelling variations:
"harvard world urban studies books series." » "harvard world urban studies book series.", "harvard world urban studies booklet series.", "harvard world urban student books series.", "harvard world urban studies books strips.", "harvard worst urban studies books series."
"harvard cold bank study rom series." » "harvard cold bank study forum series.", "harvard world bank study rom series.", "harvard bond bank study rom series.", "harvard good bank study rom series.", "harvard cold bank study from series.", "harvard cold bank study roma series.", "harvard cold bank study roman series."

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