Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "public administracao" (Expand Search)
"publicosaos administration" » "publicaosaos administration" (Expand Search), "publicoosaos administration" (Expand Search), "publicasosaos administration" (Expand Search), "publicosaos administracao" (Expand Search)
"publicao administration" » "publicaao administration" (Expand Search), "publicoao administration" (Expand Search), "publicasao administration" (Expand Search), "publicao administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas 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 ("publicosaos administration"))) OR ("publicao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicosaos administration\"))) OR (\"publicao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicosaos administration ))) OR ( publicao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicosaos administration"))) OR ("publicao administration"))*.