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)
"publicoasoas administration" » "publicaoasoas administration" (Expand Search), "publicooasoas administration" (Expand Search), "publicasoasoas administration" (Expand Search), "publicoasoas administracao" (Expand Search)
"publicosa administration" » "publicaosa administration" (Expand Search), "publicoosa administration" (Expand Search), "publicasosa administration" (Expand Search), "publicosa administracao" (Expand Search), "publicos administration" (Expand Search), "publica 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 ("publicoasoas administration"))) OR ("publicosa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoasoas administration\"))) OR (\"publicosa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoasoas administration ))) OR ( publicosa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoasoas administration"))) OR ("publicosa administration"))*.