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

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