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