Perhaps you should try some spelling variations:
"public administration" » "publico administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publica administration" » "publicoa administration" (Expand Search), "publicasa administration" (Expand Search), "publicosa administration" (Expand Search)
"publicoas administracao" » "publicooas administracao" (Expand Search), "publicasoas administracao" (Expand Search), "publicosoas administracao" (Expand Search), "publicas administracao" (Expand Search), "publicos administracao" (Expand Search), "publico 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 ((("publica administration") OR ("publicoas administracao"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publica administration\") OR (\"publicoas administracao\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publica administration ) OR ( publicoas administracao )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publica administration") OR ("publicoas administracao"))))*.