Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publico administration" » "publicao administration" (Expand Search), "publicaso administration" (Expand Search), "publicoso administration" (Expand Search), "publico administracao" (Expand Search), "publica administration" (Expand Search)
"publicosoaas administration" » "publicaosoaas administration" (Expand Search), "publicasosoaas administration" (Expand Search), "publicososoaas administration" (Expand Search), "publicosoaas administracao" (Expand Search), "publicasoaas 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 ((("publico administration") OR ("publicosoaas administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publico administration\") OR (\"publicosoaas administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publico administration ) OR ( publicosoaas administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publico administration") OR ("publicosoaas administration"))))*.