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)
"publicoaaa administration" » "publicaoaaa administration" (Expand Search), "publicooaaa administration" (Expand Search), "publicasoaaa administration" (Expand Search), "publicoaaa 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 ((("publicoaaa administration") OR ("publicaaas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publicoaaa administration\") OR (\"publicaaas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publicoaaa administration ) OR ( publicaaas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publicoaaa administration") OR ("publicaaas administration"))))*.