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)
"publicaooaaa administration" » "publicaaooaaa administration" (Expand Search), "publicoaooaaa administration" (Expand Search), "publicasaooaaa administration" (Expand Search), "publicaooaaa administracao" (Expand Search)
"publicaaas administration" » "publicaaaas administration" (Expand Search), "publicoaaas administration" (Expand Search), "publicasaaas administration" (Expand Search), "publicaaas administracao" (Expand Search), "publicas 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 ((("publicaooaaa administration") OR ("publicaaas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicaooaaa administration\") OR (\"publicaaas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicaooaaa administration ) OR ( publicaaas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicaooaaa administration") OR ("publicaaas administration"))))*.