Perhaps you should try some spelling variations:
"publica administration" » "publica administracao" (Expand Search)
"publicas administration" » "publicas administracao" (Expand Search), "publico administration" (Expand Search)
"publicasas administration" » "publicasas administracao" (Expand Search), "publicoas administration" (Expand Search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"publica administration\") OR (((\"publicas administration\") OR (\"publicasas administration\"))))~".
• Removing quotes may allow a broader search: (( publica administration ) OR ((( publicas administration ) OR ( publicasas administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("publica administration") OR ((("publicas administration") OR ("publicasas administration"))))*.