Perhaps you should try some spelling variations:
"harvard food bank studies book series." » "harvard food case studies book series.", "harvard food bank study book series.", "harvard food bank studies from series.", "harvard good bank studies book series.", "harvard blood bank studies book series.", "harvard good banks studies book series."
"harvard second urban studies book series." » "harvard second urban studies from series.", "harvard second loan studies book series.", "harvard second rural studies book 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 food bank studies book series.") OR ("harvard second urban studies book series."))~.
• Removing quotes may allow a broader search: (( harvard food bank studies book series. ) or ( harvard second urban studies book series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard food bank studies book series.") or ("harvard second urban studies book series."))*.