Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search)
"publicaaa administracao" » "publicaaaa administracao" (Expand Search), "publicoaaa administracao" (Expand Search), "publicosaaa administracao" (Expand Search), "publica administracao" (Expand Search)
"publicas administration" » "publicaas administration" (Expand Search), "publicoas administration" (Expand Search), "publicosas administration" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("public administration") OR ((("publicaaa administracao") OR ("publicas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicaaa administracao\") OR (\"publicas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicaaa administracao ) OR ( publicas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicaaa administracao") OR ("publicas administration"))))*.