Perhaps you should try some spelling variations:
"harvard world bank studies book series." » "harvard world urban studies book series.", "harvard world bank study book series.", "harvard world bank studies books series.", "harvard world bank studies ebook series."
"harvard cold case studies from surveys." » "harvard cold case studies from survey.", "harvard cold case studies firm surveys.", "harvard cold case studies force surveys.", "harvard world case studies from surveys.", "harvard cold call studies from surveys.", "harvard cold wave 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 world bank studies book series.") or ("harvard cold case studies from surveys."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("harvard world bank studies book series.") OR ("harvard cold case studies from surveys.")).
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• Adding a wildcard symbol may retrieve word variants: (("harvard world bank studies book series.") or ("harvard cold case studies from surveys."))*.