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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("urban development studies.") or ((("a development series.") or ("clean development africa."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("urban development studies.") OR ((("a development series.") OR ("clean development africa."))))*.
• Removing quotes may allow a broader search: (( urban development studies. ) or ((( a development series. ) or ( clean development africa. ))))*.