Perhaps you should try some spelling variations:
"a development studies." » "a development series.", "a development services.", "a development strategies."
"city development studies." » "city development series.", "city development services.", "city development strategies.", "capacity development studies.", "policy development studies.", "community development studies."
"clean development studies." » "clean development series.", "clean development services.", "clean development strategies.", "human development studies.", "urban development studies."

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 ("city development studies."))) or ("clean development studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a development studies.") OR ("city development studies."))) OR ("clean development studies.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a development studies.\") OR (\"city development studies.\"))) or (\"clean development studies.\"))".
• Removing quotes may allow a broader search: (((( a development studies. ) OR ( city development studies. ))) or ( clean development studies. )).
• Adding a wildcard symbol may retrieve word variants: (((("a development studies.") OR ("city development studies."))) or ("clean development studies."))*.