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