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