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