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)
"publicooas administration" » "publicaooas administration" (Expand Search), "publicoooas administration" (Expand Search), "publicasooas administration" (Expand Search), "publicooas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicoooaaa administration" » "publicaoooaaa administration" (Expand Search), "publicooooaaa administration" (Expand Search), "publicasoooaaa administration" (Expand Search), "publicoooaaa 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 ("publicooas administration"))) OR ("publicoooaaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicooas administration\"))) OR (\"publicoooaaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicooas administration ))) OR ( publicoooaaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicooas administration"))) OR ("publicoooaaa administration"))*.