Perhaps you should try some spelling variations:
"mine development policies." » "mine development policy.", "mine development projects.", "trade development policies.", "business development policies."
"sme development policies." » "sme development policy.", "sme development projects.", "trade development policies."
"a development series." » "a development services.", "a development agencies.", "a development strategies."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("a development series.") OR ((("mine development policies.") OR ("sme development policies."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"a development series.\") or (((\"mine development policies.\") OR (\"sme development policies.\"))))~".
• Removing quotes may allow a broader search: (( a development series. ) or ((( mine development policies. ) OR ( sme development policies. ))))~.
• Adding a wildcard symbol may retrieve word variants: (("a development series.") or ((("mine development policies.") OR ("sme development policies."))))*.