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)
"publicasaosas administration" » "publicaasaosas administration" (Expand Search), "publicoasaosas administration" (Expand Search), "publicasasaosas administration" (Expand Search), "publicasaosas administracao" (Expand Search)
"publicoos administration" » "publicaoos administration" (Expand Search), "publicooos administration" (Expand Search), "publicasoos administration" (Expand Search), "publicoos administracao" (Expand Search), "publicos 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 ("publicasaosas administration"))) OR ("publicoos administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicasaosas administration\"))) OR (\"publicoos administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicasaosas administration ))) OR ( publicoos administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicasaosas administration"))) OR ("publicoos administration"))*.