Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaaaas administration" » "publicaoaaaas administration" (Expand Search), "publicooaaaas administration" (Expand Search), "publicasoaaaas administration" (Expand Search)
"publicooas administracao" » "publicaooas administracao" (Expand Search), "publicoooas administracao" (Expand Search), "publicasooas administracao" (Expand Search), "publicas administracao" (Expand Search), "publicos administracao" (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 ((("publicoaaaas administration") OR ("publicooas administracao"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicoaaaas administration\") OR (\"publicooas administracao\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoaaaas administration ) OR ( publicooas administracao )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoaaaas administration") OR ("publicooas administracao"))))*.