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)
"publicaso administration" » "publicaaso administration" (Expand Search), "publicoaso administration" (Expand Search), "publicasaso administration" (Expand Search), "publicaso administracao" (Expand Search), "publicas administration" (Expand Search), "publica administration" (Expand Search), "publico 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 ("publicaso administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaos administration\"))) OR (\"publicaso administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaos administration ))) OR ( publicaso administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaos administration"))) OR ("publicaso administration"))*.