Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaaas administration" » "publicaoaaas administration" (Expand Search), "publicooaaas administration" (Expand Search), "publicasoaaas administration" (Expand Search)
"publicooaa administracao" » "publicaooaa administracao" (Expand Search), "publicoooaa administracao" (Expand Search), "publicasooaa 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 ("publicoaaas administration"))) OR ("publicooaa administracao"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaas administration\"))) OR (\"publicooaa administracao\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaas administration ))) OR ( publicooaa administracao )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaas administration"))) OR ("publicooaa administracao"))*.