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