Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard world urban studies book series.", "harvard world bank studies books series.", "harvard world bank studies ebook series."
"harvard cold bank study from sources." » "harvard cold bank studies from sources.", "harvard bond bank study from sources.", "harvard good bank study from sources.", "harvard food bank study 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 cold bank study from sources.") OR ("harvard world bank studies book series."))~.
• Removing quotes may allow a broader search: (( harvard cold bank study from sources. ) or ( harvard world bank studies book series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard cold bank study from sources.") or ("harvard world bank studies book series."))*.