Perhaps you should try some spelling variations:
"e development studies." » "e development services.", "e development strategies.", "e development strategy.", "sme development studies.", "site development studies.", "trade development studies."
"mine development series." » "mine development services.", "mine development agencies.", "mine development strategies.", "sme development series.", "trade development series.", "business development series.", "minsme development series.", "minsite development series.", "mintrade development series."
"a development series." » "a development services.", "a development agencies.", "a development strategies."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("e development studies.") or ((("mine development series.") or ("a development series."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("e development studies.") OR ((("mine development series.") OR ("a development series.")))).
• Removing quotes may allow a broader search: (( e development studies. ) or ((( mine development series. ) or ( a development series. )))).
• Adding a wildcard symbol may retrieve word variants: (("e development studies.") or ((("mine development series.") or ("a development series."))))*.