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