Perhaps you should try some spelling variations:
"_ development services." » "_ development process."
"sme development studies." » "sme development strategies.", "sme development strategy.", "sme development policies.", "trade development studies."
"urban development series." » "urban development agencies.", "urban development strategies.", "urban development strategy.", "human development series."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sme development studies.") OR ("urban development series."))) OR ("_ development services."))~.
• Removing quotes may allow a broader search: (((( sme development studies. ) or ( urban development series. ))) or ( _ development services. ))~.
• Adding a wildcard symbol may retrieve word variants: (((("sme development studies.") or ("urban development series."))) or ("_ development services."))*.