Perhaps you should try some spelling variations:
"a development services." » "a development agencies.", "a development process.", "a development africa.", "_ development services.", "clean development services.", "asian development services."
"city development studies." » "city development strategies.", "city development strategy.", "city development policies.", "capacity development studies.", "capital development studies.", "policy development studies."
"child development series." » "child development agencies.", "child development africa.", "child development strategies.", "world 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 services.") or ("child development series."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("city development studies.") OR ((("a development services.") OR ("child development series.")))).
• Removing quotes may allow a broader search: (( city development studies. ) or ((( a development services. ) or ( child development series. )))).
• Adding a wildcard symbol may retrieve word variants: (("city development studies.") or ((("a development services.") or ("child development series."))))*.