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)
"publicoas administration" » "publicaoas administration" (Expand Search), "publicooas administration" (Expand Search), "publicasoas administration" (Expand Search), "publicoas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publica administration" (Expand Search)
"publicooosas administration" » "publicaooosas administration" (Expand Search), "publicoooosas administration" (Expand Search), "publicasooosas administration" (Expand Search), "publicooosas 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 (((\"publicoas administration\") OR (\"publicooosas administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoas administration ) OR ( publicooosas administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoas administration") OR ("publicooosas administration"))))*.