Perhaps you should try some spelling variations:
"harvard world case studies from surveys." » "harvard world case studies from survey.", "harvard world case studies firm surveys.", "harvard world case studies force surveys.", "harvard world class studies from surveys."
"harvard cold case studies from series." » "harvard cold case studies rom series.", "harvard cold case studies from services.", "harvard cold case studies forum series.", "harvard cold call studies from series.", "harvard cold wave studies from series.", "harvard good case studies from 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 cold case studies from series.") OR ("harvard world case studies from surveys."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"harvard cold case studies from series.\") OR (\"harvard world case studies from surveys.\"))".
• Removing quotes may allow a broader search: (( harvard cold case studies from series. ) OR ( harvard world case studies from surveys. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard cold case studies from series.") OR ("harvard world case studies from surveys."))*.