Perhaps you should try some spelling variations:
"_ development projects." » "_ development policy."
"a development studies." » "a development series.", "a development services.", "a development strategies.", "clean development studies.", "asian development studies.", "city development studies."
"human development studies." » "human development series.", "human development services.", "human development strategies."

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