Perhaps you should try some spelling variations:
"public administration" » "publico administration" (Expand Search), "publicas administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publica administration" » "publicoa administration" (Expand Search), "publicasa administration" (Expand Search), "publicosa administration" (Expand Search), "publica administracao" (Expand Search)
"publicassa administration" » "publicoassa administration" (Expand Search), "publicasassa administration" (Expand Search), "publicosassa administration" (Expand Search), "publicassa 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 ((("publica administration") OR ("publicassa administration"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"public administration\") OR (((\"publica administration\") OR (\"publicassa administration\"))))".
• Removing quotes may allow a broader search: (( public administration ) OR ((( publica administration ) OR ( publicassa administration )))).
• Adding a wildcard symbol may retrieve word variants: (("public administration") OR ((("publica administration") OR ("publicassa administration"))))*.