Perhaps you should try some spelling variations:
"publica administration" » "publica administracao" (Expand Search)
"publicaas administration" » "publicaas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicoosas administration" » "publicoosas administracao" (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 (((\"publicaas administration\") OR (\"publicoosas administration\"))))~".
• Removing quotes may allow a broader search: (( publica administration ) OR ((( publicaas administration ) OR ( publicoosas administration ))))~.
• Adding a wildcard symbol may retrieve word variants: (("publica administration") OR ((("publicaas administration") OR ("publicoosas administration"))))*.