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 toll legal studies book series." » "harvard toll global studies book series.", "harvard toll regional studies book series.", "harvard cold legal studies book series.", "harvard home legal studies book series.", "harvard toll level studies book series.", "harvard full legal studies book series.", "harvard toll legal studies books series.", "harvard toll legal studies ebook series."

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 case studies book series.") or ("harvard toll legal studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world case studies book series.") OR ("harvard toll legal studies book series."))*.
• Removing quotes may allow a broader search: (( harvard world case studies book series. ) or ( harvard toll legal studies book series. ))*.