Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoas administracao" » "publicaoas administracao" (Expand Search), "publicooas administracao" (Expand Search), "publicasoas administracao" (Expand Search), "publicas administracao" (Expand Search), "publicos administracao" (Expand Search), "publica administracao" (Expand Search)
"publicaaooaa administration" » "publicaaaooaa administration" (Expand Search), "publicoaaooaa administration" (Expand Search), "publicasaaooaa 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 ("publicoas administracao"))) OR ("publicaaooaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoas administracao\"))) OR (\"publicaaooaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoas administracao ))) OR ( publicaaooaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoas administracao"))) OR ("publicaaooaa administration"))*.