Perhaps you should try some spelling variations:
"a development strategies." » "a development strategy.", "_ development strategies.", "clean development strategies.", "asian development strategies."
"child development studies." » "child development services.", "child development strategy.", "child development policies.", "world development studies."
"a development series." » "a development services.", "a development agencies.", "a development africa.", "_ 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: (((("a development strategies.") or ("a development series."))) or ("child development studies."))~.
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• Removing quotes may allow a broader search: (((( a development strategies. ) or ( a development series. ))) or ( child development studies. )).
• Adding a wildcard symbol may retrieve word variants: (((("a development strategies.") or ("a development series."))) or ("child development studies."))*.