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