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)
"publicoaas administration" » "publicaoaas administration" (Expand Search), "publicooaas administration" (Expand Search), "publicasoaas administration" (Expand Search), "publicoaas administracao" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search)
"publicaooaa administration" » "publicaaooaa administration" (Expand Search), "publicoaooaa administration" (Expand Search), "publicasaooaa administration" (Expand Search), "publicaooaa 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 ("publicoaas administration"))) OR ("publicaooaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaas administration\"))) OR (\"publicaooaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaas administration ))) OR ( publicaooaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaas administration"))) OR ("publicaooaa administration"))*.