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