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