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)
"publicoaas administration" » "publicaoaas administration" (Expand Search), "publicooaas administration" (Expand Search), "publicasoaas administration" (Expand Search), "publicoaas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicooso administration" » "publicaooso administration" (Expand Search), "publicoooso administration" (Expand Search), "publicasooso administration" (Expand Search), "publicooso administracao" (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 ("publicoaas administration"))) OR ("publicooso administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaas administration\"))) OR (\"publicooso administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaas administration ))) OR ( publicooso administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaas administration"))) OR ("publicooso administration"))*.