Perhaps you should try some spelling variations:
"asian development services." » "asian development process.", "human development services.", "urban development services.", "clean development services."
"a development studies." » "a development series.", "a development strategies.", "a development strategy."
"_ development studies." » "_ development series.", "_ development strategies.", "_ development strategy."

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 ("asian development services."))) or ("_ development studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a development studies.") OR ("asian development services."))) OR ("_ development studies."))*.
• Removing quotes may allow a broader search: (((( a development studies. ) or ( asian development services. ))) or ( _ development studies. ))*.