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

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard good bank study from sources.") or ("harvard world case studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard good bank study from sources.") OR ("harvard world case studies book series.")).
• Removing quotes may allow a broader search: (( harvard good bank study from sources. ) or ( harvard world case studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard good bank study from sources.") or ("harvard world case studies book series."))*.