Perhaps you should try some spelling variations:
"child development services." » "child development agencies.", "child development process.", "child development africa.", "world development services."
"city development studies." » "city development strategies.", "city development strategy.", "city development policies.", "capacity development studies.", "capital development studies.", "policy development studies."
"a development series." » "a development agencies.", "a development africa.", "a development strategies.", "_ development series.", "clean development series.", "asian development series."

Try widening your search to All Fields.

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