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

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard cold bank study from sources.") OR ("harvard world class studies book series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard cold bank study from sources.\") OR (\"harvard world class studies book series.\"))*".
• Removing quotes may allow a broader search: (( harvard cold bank study from sources. ) OR ( harvard world class studies book series. ))*.