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