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)
"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)
"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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("public administration") OR ("publicoos administration"))) OR ("publicasaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoos administration\"))) OR (\"publicasaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoos administration ))) OR ( publicasaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoos administration"))) OR ("publicasaa administration"))*.