Perhaps you should try some spelling variations:
"a development strategies." » "a development strategy."
"a development studies." » "a development series.", "a development services.", "a development strategy."
"child development studies." » "child development series.", "child development services.", "child development strategy.", "world development studies."

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

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