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)
"publicaaaaas administration" » "publicaaaaaas administration" (Expand Search), "publicoaaaaas administration" (Expand Search), "publicasaaaaas administration" (Expand Search), "publicaaaaas administracao" (Expand Search), "publicaaaas administration" (Expand Search), "publicasaaas administration" (Expand Search), "publicoaaas administration" (Expand Search)
"publicaa administration" » "publicaaa administration" (Expand Search), "publicoaa administration" (Expand Search), "publicasaa administration" (Expand Search), "publicaa administracao" (Expand Search), "publica administration" (Expand Search), "publicas administration" (Expand Search), "publico 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 ("publicaaaaas administration"))) OR ("publicaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicaaaaas administration\"))) OR (\"publicaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicaaaaas administration ))) OR ( publicaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicaaaaas administration"))) OR ("publicaa administration"))*.