Perhaps you should try some spelling variations:
"harvard cold urban studies from sources." » "harvard cold urban studies fuel sources.", "harvard cold urban studies from survey.", "harvard good urban studies from sources.", "harvard cost urban studies from sources.", "harvard second urban studies from sources."
"harvard world bank study book series." » "harvard world bank study books series.", "harvard world bank study ebook series."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard world bank study book series.") or ("harvard cold urban studies from sources."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank study book series.") OR ("harvard cold urban studies from sources."))*.
• Removing quotes may allow a broader search: (( harvard world bank study book series. ) or ( harvard cold urban studies from sources. ))*.