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)
"publicaaa administration" » "publicaaaa administration" (Expand Search), "publicoaaa administration" (Expand Search), "publicasaaa administration" (Expand Search), "publicaaa administracao" (Expand Search), "publica administration" (Expand Search), "publicas 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 ("publicaaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoa administration\"))) OR (\"publicaaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoa administration ))) OR ( publicaaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoa administration"))) OR ("publicaaa administration"))*.