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)
"publicooss administration" » "publicaooss administration" (Expand Search), "publicoooss administration" (Expand Search), "publicasooss administration" (Expand Search), "publicooss administracao" (Expand Search), "publicos administration" (Expand Search)
"publicaos administration" » "publicaaos administration" (Expand Search), "publicoaos administration" (Expand Search), "publicasaos administration" (Expand Search), "publicaos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos 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 ("publicooss administration"))) OR ("publicaos administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooss administration\"))) OR (\"publicaos administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooss administration ))) OR ( publicaos administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooss administration"))) OR ("publicaos administration"))*.