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)
"publicaos administration" » "publicaaos administration" (Expand Search), "publicoaos administration" (Expand Search), "publicasaos administration" (Expand Search), "publicaos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publica administration" (Expand Search), "publicass administration" (Expand Search)
"publicao administration" » "publicaao administration" (Expand Search), "publicoao administration" (Expand Search), "publicasao administration" (Expand Search), "publicao administracao" (Expand Search), "publica 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 (\"publicaos administration\"))) OR (\"publicao administration\"))~".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaos administration ))) OR ( publicao administration ))~.
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaos administration"))) OR ("publicao administration"))*.