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

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