Perhaps you should try some spelling variations:
"harvard world bank study ebook series." » "harvard cold bank study ebook series.", "harvard world bank study book series.", "harvard world bank study textbook series.", "harvard world bank study yearbook series.", "harvard world bank study facebook series."
"harvard clld urban studies from surveys." » "harvard cold urban studies from surveys.", "harvard camp urban studies from surveys.", "harvard clld urban studies from survey.", "harvard clld urban studies firm surveys.", "harvard clld urban studies force surveys.", "harvard led urban studies from surveys."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("harvard clld urban studies from surveys.") or ("harvard world bank study ebook series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard clld urban studies from surveys.") OR ("harvard world bank study ebook series.")).
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• Adding a wildcard symbol may retrieve word variants: (("harvard clld urban studies from surveys.") or ("harvard world bank study ebook series."))*.