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