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)
"publicoaaaas administration" » "publicaoaaaas administration" (Expand Search), "publicooaaaas administration" (Expand Search), "publicasoaaaas administration" (Expand Search), "publicoaaaas administracao" (Expand Search)
"publicoao administration" » "publicaoao administration" (Expand Search), "publicooao administration" (Expand Search), "publicasoao administration" (Expand Search), "publicoao administracao" (Expand Search), "publica 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 ("publicoaaaas administration"))) OR ("publicoao administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaaas administration\"))) OR (\"publicoao administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaaas administration ))) OR ( publicoao administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaaas administration"))) OR ("publicoao administration"))*.