Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicos administracao" » "publicaos administracao" (Expand Search), "publicoos administracao" (Expand Search), "publicasos administracao" (Expand Search), "publico administracao" (Expand Search), "publicas administracao" (Expand Search), "publica administracao" (Expand Search)
"publicoos administration" » "publicaoos administration" (Expand Search), "publicooos administration" (Expand Search), "publicasoos administration" (Expand Search), "publico administration" (Expand Search), "publicas 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 ((("publicos administracao") OR ("publicoos administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicos administracao\") OR (\"publicoos administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicos administracao ) OR ( publicoos administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicos administracao") OR ("publicoos administration"))))*.