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