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)
"publicoaaas administration" » "publicaoaaas administration" (Expand Search), "publicooaaas administration" (Expand Search), "publicasoaaas administration" (Expand Search), "publicoaaas administracao" (Expand Search)
"publicaaaa administration" » "publicaaaaa administration" (Expand Search), "publicoaaaa administration" (Expand Search), "publicasaaaa administration" (Expand Search), "publicaaaa 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 ("publicaaaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaas administration\"))) OR (\"publicaaaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaas administration ))) OR ( publicaaaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaas administration"))) OR ("publicaaaa administration"))*.