Perhaps you should try some spelling variations:
"clean development studies." » "clean development series.", "clean development strategies.", "clean development strategy.", "human development studies.", "urban development studies."
"e development process." » "e development projects.", "e development programs.", "e development policies.", "sme development process.", "mine development process.", "site development process."
"e development services." » "sme development services.", "mine development services.", "site development services."

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: (("clean development studies.") or ((("e development services.") OR ("e development process."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clean development studies.") OR ((("e development services.") OR ("e development process.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"clean development studies.\") or (((\"e development services.\") OR (\"e development process.\"))))".
• Removing quotes may allow a broader search: (( clean development studies. ) or ((( e development services. ) OR ( e development process. )))).
• Adding a wildcard symbol may retrieve word variants: (("clean development studies.") or ((("e development services.") OR ("e development process."))))*.