Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard cold bank studies book series.", "harvard world bank study book series.", "harvard world bank studies books series.", "harvard world bank studies ebook series."
"harvard bond urban studies book series." » "harvard cold urban studies book series.", "harvard home urban studies book series.", "harvard beyond urban studies book series.", "harvard good urban studies book series.", "harvard bank urban studies book series.", "harvard bond urban studies books series.", "harvard bond 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 bond urban studies book series.") or ("harvard world bank studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard bond urban studies book series.") OR ("harvard world bank studies book series.")).
• Removing quotes may allow a broader search: (( harvard bond urban studies book series. ) or ( harvard world bank studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard bond urban studies book series.") or ("harvard world bank studies book series."))*.