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