Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard world bank study book series.", "harvard world bank studies books series.", "harvard world bank studies ebook series."
"harvard cold urban studies book series." » "harvard clld urban studies book series.", "harvard world urban studies book series.", "harvard good urban studies book series.", "harvard cold urban studies books series.", "harvard cold urban studies ebook series."

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 bank studies book series.") or ("harvard cold urban studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies book series.") OR ("harvard cold urban studies book series."))*.
• Removing quotes may allow a broader search: (( harvard world bank studies book series. ) or ( harvard cold urban studies book series. ))*.