Perhaps you should try some spelling variations:
"harvard good bad studies from surveys." » "harvard home bad studies from surveys.", "harvard good bad studies from survey.", "harvard good bad studies firm surveys.", "harvard good bad studies force surveys.", "harvard good based studies from surveys.", "harvard good eadi studies from surveys.", "harvard good oecd studies from surveys."
"harvard cold urban studies book series." » "harvard clld urban studies book series.", "harvard world urban studies book series.", "harvard good urban studies book series.", "harvard cold urban studies books series.", "harvard cold urban studies ebook series."

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

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