Perhaps you should try some spelling variations:
"mine development studies." » "mine development services.", "mine development strategies.", "mine development strategy.", "sme development studies.", "trade development studies.", "based development studies."
"asian development studies." » "asian development services.", "asian development strategies.", "asian development strategy.", "human development studies.", "urban development studies.", "clean development studies."
"_ development series." » "_ development services.", "_ development agencies.", "_ 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 ("asian development studies."))) or ("_ development series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mine development studies.") OR ("asian development studies."))) OR ("_ development series.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"mine development studies.\") OR (\"asian development studies.\"))) or (\"_ development series.\"))".
• Removing quotes may allow a broader search: (((( mine development studies. ) OR ( asian development studies. ))) or ( _ development series. )).
• Adding a wildcard symbol may retrieve word variants: (((("mine development studies.") OR ("asian development studies."))) or ("_ development series."))*.