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