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

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("e development studies.") OR ("a development studies."))) or ("e development series."))~.
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• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"e development studies.\") OR (\"a development studies.\"))) or (\"e development series.\"))".
• Removing quotes may allow a broader search: (((( e development studies. ) OR ( a development studies. ))) or ( e development series. )).
• Adding a wildcard symbol may retrieve word variants: (((("e development studies.") OR ("a development studies."))) or ("e development series."))*.