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

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("e development studies.") or ("e development series."))) or ("a development studies."))~.
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• Adding a wildcard symbol may retrieve word variants: (((("e development studies.") or ("e development series."))) or ("a development studies."))*.