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

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 ("clean development studies."))) OR ("child development series."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a development studies.\") OR (\"clean development studies.\"))) OR (\"child development series.\"))".
• Removing quotes may allow a broader search: (((( a development studies. ) OR ( clean development studies. ))) OR ( child development series. )).
• Adding a wildcard symbol may retrieve word variants: (((("a development studies.") OR ("clean development studies."))) OR ("child development series."))*.