Perhaps you should try some spelling variations:
"harvard good case studies from surveys." » "harvard good case studies from survey.", "harvard good case studies firm surveys.", "harvard good case studies force surveys.", "harvard food case studies from surveys."
"harvard cold urban studies book series." » "harvard good urban studies book series.", "harvard cost urban studies book series.", "harvard second urban studies book 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 good case studies from surveys.") or ("harvard cold urban studies book series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard good case studies from surveys.") OR ("harvard cold urban studies book series.")).
• Removing quotes may allow a broader search: (( harvard good case studies from surveys. ) or ( harvard cold urban studies book series. )).
• Adding a wildcard symbol may retrieve word variants: (("harvard good case studies from surveys.") or ("harvard cold urban studies book series."))*.