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)
"publicoa administration" » "publicaoa administration" (Expand Search), "publicooa administration" (Expand Search), "publicasoa administration" (Expand Search), "publicoa administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search)
"publicoasaa administration" » "publicaoasaa administration" (Expand Search), "publicooasaa administration" (Expand Search), "publicasoasaa administration" (Expand Search), "publicoasaa administracao" (Expand Search), "publicasaa administration" (Expand Search), "publicosaa administration" (Expand Search), "publicossaa 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 ("publicoa administration"))) OR ("publicoasaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoa administration\"))) OR (\"publicoasaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoa administration ))) OR ( publicoasaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoa administration"))) OR ("publicoasaa administration"))*.