Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaaaas administracao" » "publicaoaaaas administracao" (Expand Search), "publicooaaaas administracao" (Expand Search), "publicasoaaaas administracao" (Expand Search)
"publicaa administration" » "publicaaa administration" (Expand Search), "publicoaa administration" (Expand Search), "publicasaa administration" (Expand Search), "publica administration" (Expand Search), "publicas administration" (Expand Search), "publico 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 ("publicoaaaas administracao"))) OR ("publicaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaaas administracao\"))) OR (\"publicaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaaas administracao ))) OR ( publicaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaaas administracao"))) OR ("publicaa administration"))*.