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

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard world case studies book series.\") OR (\"harvard cold bank studies from sources.\"))~".
• Removing quotes may allow a broader search: (( harvard world case studies book series. ) OR ( harvard cold bank studies from sources. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard world case studies book series.") OR ("harvard cold bank studies from sources."))*.