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)
"publicasaaaas administration" » "publicaasaaaas administration" (Expand Search), "publicoasaaaas administration" (Expand Search), "publicasasaaaas administration" (Expand Search), "publicasaaaas administracao" (Expand Search)
"publicos administration" » "publicaos administration" (Expand Search), "publicoos administration" (Expand Search), "publicasos administration" (Expand Search), "publicos administracao" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "publica 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 ("publicasaaaas administration"))) OR ("publicos administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicasaaaas administration\"))) OR (\"publicos administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicasaaaas administration ))) OR ( publicos administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicasaaaas administration"))) OR ("publicos administration"))*.