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