Perhaps you should try some spelling variations:
"_ development studies." » "_ development services.", "_ development strategies.", "_ development strategy."
"city development series." » "city development services.", "city development agencies.", "city development strategies.", "capacity development series.", "policy development series.", "community development series."
"clean development africa." » "human development africa.", "urban development africa."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("_ development studies.") or ((("city development series.") or ("clean development africa."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ development studies.") OR ((("city development series.") OR ("clean development africa.")))).
• Removing quotes may allow a broader search: (( _ development studies. ) or ((( city development series. ) or ( clean development africa. )))).
• Adding a wildcard symbol may retrieve word variants: (("_ development studies.") or ((("city development series.") or ("clean development africa."))))*.