Perhaps you should try some spelling variations:
"e development strategies." » "e development strategy.", "sme development strategies.", "mine development strategies.", "site development strategies."
"e development services." » "e development process.", "sme development services.", "mine development services.", "site development services."
"e development africa." » "sme development africa.", "mine development africa.", "site development africa."

Try widening your search to All Fields.

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