Perhaps you should try some spelling variations:
"harvard cold bank study from surveys." » "harvard cold bank study from survey.", "harvard cold bank study firm surveys.", "harvard cold bank study force surveys.", "harvard cold bank studies from surveys.", "harvard bond bank study from surveys.", "harvard good bank study from surveys.", "harvard food bank study from surveys."
"harvard world bank studies book series." » "harvard world urban studies book series.", "harvard world bank studies books series.", "harvard world bank 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 cold bank study from surveys.") OR ("harvard world bank studies book series."))~.
• Removing quotes may allow a broader search: (( harvard cold bank study from surveys. ) or ( harvard world bank studies book series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard cold bank study from surveys.") or ("harvard world bank studies book series."))*.