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)
"publicaoao administration" » "publicaaoao administration" (Expand Search), "publicoaoao administration" (Expand Search), "publicasaoao administration" (Expand Search), "publicaoao administracao" (Expand Search)
"publicoosas administration" » "publicaoosas administration" (Expand Search), "publicooosas administration" (Expand Search), "publicasoosas administration" (Expand Search), "publicoosas administracao" (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 ("publicaoao administration"))) OR ("publicoosas administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaoao administration\"))) OR (\"publicoosas administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaoao administration ))) OR ( publicoosas administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaoao administration"))) OR ("publicoosas administration"))*.