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)
"publicaoos administration" » "publicaaoos administration" (Expand Search), "publicoaoos administration" (Expand Search), "publicasaoos administration" (Expand Search), "publicaoos administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicoaaa administration" » "publicaoaaa administration" (Expand Search), "publicooaaa administration" (Expand Search), "publicasoaaa administration" (Expand Search), "publicoaaa administracao" (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 ("publicaoos administration"))) OR ("publicoaaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaoos administration\"))) OR (\"publicoaaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaoos administration ))) OR ( publicoaaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaoos administration"))) OR ("publicoaaa administration"))*.