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)
"publicaaaas administration" » "publicaaaaas administration" (Expand Search), "publicoaaaas administration" (Expand Search), "publicasaaaas administration" (Expand Search), "publicaaaas administracao" (Expand Search)
"publicosaa administration" » "publicaosaa administration" (Expand Search), "publicoosaa administration" (Expand Search), "publicasosaa administration" (Expand Search), "publicosaa administracao" (Expand Search), "publicos 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 ("publicaaaas administration"))) OR ("publicosaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaaas administration\"))) OR (\"publicosaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaaas administration ))) OR ( publicosaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaaas administration"))) OR ("publicosaa administration"))*.