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

Try widening your search to All Fields.

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 series.") or ("_ development studies."))) or ("clean development studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a development series.") OR ("_ development studies."))) OR ("clean development studies.")).
• Removing quotes may allow a broader search: (((( a development series. ) or ( _ development studies. ))) or ( clean development studies. )).
• Adding a wildcard symbol may retrieve word variants: (((("a development series.") or ("_ development studies."))) or ("clean development studies."))*.