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)
"publicoaaos administration" » "publicaoaaos administration" (Expand Search), "publicooaaos administration" (Expand Search), "publicasoaaos administration" (Expand Search), "publicoaaos administracao" (Expand Search)
"publicosas administration" » "publicaosas administration" (Expand Search), "publicoosas administration" (Expand Search), "publicasosas administration" (Expand Search), "publicosas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos 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 ("publicoaaos administration"))) OR ("publicosas administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaos administration\"))) OR (\"publicosas administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaos administration ))) OR ( publicosas administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaos administration"))) OR ("publicosas administration"))*.