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

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 world class studies book series.") or ("harvard world bank studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world class studies book series.") OR ("harvard world bank studies book series.")).
• Removing quotes may allow a broader search: (( harvard world class studies book series. ) or ( harvard world bank studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard world class studies book series.") or ("harvard world bank studies book series."))*.