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

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

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