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)
"publicoosas administration" » "publicaoosas administration" (Expand Search), "publicooosas administration" (Expand Search), "publicasoosas administration" (Expand Search), "publicoosas administracao" (Expand Search)
"publicasaa administration" » "publicaasaa administration" (Expand Search), "publicoasaa administration" (Expand Search), "publicasasaa administration" (Expand Search), "publicasaa administracao" (Expand Search), "publicas 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: "((((\"public administration\") OR (\"publicoosas administration\"))) OR (\"publicasaa administration\"))~".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoosas administration ))) OR ( publicasaa administration ))~.
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoosas administration"))) OR ("publicasaa administration"))*.