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