Perhaps you should try some spelling variations:
"harvard world bank studies from service." » "harvard world urban studies from service.", "harvard world bank study from service.", "harvard world bank studies from serbia."
"harvard cold case studies book series." » "harvard world case studies book series.", "harvard cold call studies book series.", "harvard cold wave studies book series.", "harvard cold case studies books series.", "harvard cold case 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 case studies book series.") OR ("harvard world bank studies from service."))~.
• Removing quotes may allow a broader search: (( harvard cold case studies book series. ) or ( harvard world bank studies from service. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard cold case studies book series.") or ("harvard world bank studies from service."))*.