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)
"publicaoas administration" » "publicaaoas administration" (Expand Search), "publicoaoas administration" (Expand Search), "publicasaoas administration" (Expand Search), "publicaoas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicoosas administration" » "publicaoosas administration" (Expand Search), "publicooosas administration" (Expand Search), "publicasoosas administration" (Expand Search), "publicoosas 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 (((\"publicaoas administration\") OR (\"publicoosas administration\"))))~".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicaoas administration ) OR ( publicoosas administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicaoas administration") OR ("publicoosas administration"))))*.