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)
"publicaas administration" » "publicaaas administration" (Expand Search), "publicasaas administration" (Expand Search), "publicosaas administration" (Expand Search), "publicas administration" (Expand Search), "publica administration" (Expand Search), "publicos 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 ("publicaas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publico administracao\") OR (\"publicaas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publico administracao ) OR ( publicaas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publico administracao") OR ("publicaas administration"))))*.