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

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 ("_ development policies."))) or ("sme development studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mine development studies.") OR ("_ development policies."))) OR ("sme development studies."))*.
• Removing quotes may allow a broader search: (((( mine development studies. ) or ( _ development policies. ))) or ( sme development studies. ))*.