Perhaps you should try some spelling variations:
"mine development studies." » "mine development series.", "mine development services.", "mine development strategies.", "sme development studies.", "trade development studies.", "business development studies."
"sma development africa." » "smart development africa.", "small development africa.", "asia development africa.", "sa development africa.", "smena development africa.", "s2 development africa."
"ma development africa." » "a development africa.", "mena development africa.", "2 development africa."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

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