Perhaps you should try some spelling variations:
"a development studies." » "a development services.", "a development strategies.", "a development strategy."
"clean development studies." » "clean development services.", "clean development strategies.", "clean development strategy.", "human development studies.", "urban development studies."
"mine development series." » "mine development services.", "mine development agencies.", "mine development strategies.", "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: (((("a development studies.") or ("clean development studies."))) or ("mine development series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a development studies.") OR ("clean development studies."))) OR ("mine development series.")).
• Removing quotes may allow a broader search: (((( a development studies. ) or ( clean development studies. ))) or ( mine development series. )).
• Adding a wildcard symbol may retrieve word variants: (((("a development studies.") or ("clean development studies."))) or ("mine development series."))*.