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)
"publicooaaos administration" » "publicaooaaos administration" (Expand Search), "publicoooaaos administration" (Expand Search), "publicasooaaos administration" (Expand Search), "publicooaaos 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)

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 ("publicooaaos administration"))) OR ("publicoa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooaaos administration\"))) OR (\"publicoa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooaaos administration ))) OR ( publicoa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooaaos administration"))) OR ("publicoa administration"))*.