Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "public administracao" (Expand Search)
"publicasoa administration" » "publicaasoa administration" (Expand Search), "publicoasoa administration" (Expand Search), "publicasasoa administration" (Expand Search), "publicasoa administracao" (Expand Search), "publicas administration" (Expand Search)
"publicoso administration" » "publicaoso administration" (Expand Search), "publicooso administration" (Expand Search), "publicasoso administration" (Expand Search), "publicoso administracao" (Expand Search), "publicos administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (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 (((\"publicasoa administration\") OR (\"publicoso administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicasoa administration ) OR ( publicoso administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicasoa administration") OR ("publicoso administration"))))*.