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)
"publicoaos administration" » "publicaoaos administration" (Expand Search), "publicooaos administration" (Expand Search), "publicasoaos administration" (Expand Search), "publicoaos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "publicaos administration" (Expand Search), "publicoos administration" (Expand Search), "publicosos administration" (Expand Search)
"publicoa administration" » "publicaoa administration" (Expand Search), "publicooa administration" (Expand Search), "publicasoa administration" (Expand Search), "publicoa administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("public administration") OR ("publicoaos administration"))) OR ("publicoa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaos administration\"))) OR (\"publicoa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaos administration ))) OR ( publicoa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaos administration"))) OR ("publicoa administration"))*.