Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaa administration" » "publicaoaa administration" (Expand Search), "publicooaa administration" (Expand Search), "publicasoaa administration" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicaaaas administracao" » "publicaaaaas administracao" (Expand Search), "publicoaaaas administracao" (Expand Search), "publicasaaaas 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 ((("publicoaa administration") OR ("publicaaaas administracao"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicoaa administration\") OR (\"publicaaaas administracao\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoaa administration ) OR ( publicaaaas administracao )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoaa administration") OR ("publicaaaas administracao"))))*.