Perhaps you should try some spelling variations:
"a development agencies." » "a development policies."
"a government agencies." » "a government policies.", "e government agencies."
"clean development studies." » "clean development series.", "clean development services.", "clean development strategies.", "human development studies.", "urban development studies."

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 agencies.") OR ("a government agencies."))) or ("clean development studies."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a development agencies.") OR ("a government agencies."))) OR ("clean development studies."))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a development agencies.\") OR (\"a government agencies.\"))) or (\"clean development studies.\"))*".
• Removing quotes may allow a broader search: (((( a development agencies. ) OR ( a government agencies. ))) or ( clean development studies. ))*.