Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publico administration" » "publicao administration" (Expand Search), "publicaso administration" (Expand Search), "publicoso administration" (Expand Search), "publico administracao" (Expand Search), "publica administration" (Expand Search)
"publicasososo administration" » "publicaasososo administration" (Expand Search), "publicasasososo administration" (Expand Search), "publicosasososo administration" (Expand Search), "publicasososo administracao" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publico administration\") OR (\"publicasososo administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publico administration ) OR ( publicasososo administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publico administration") OR ("publicasososo administration"))))*.