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)
"publicoaaas administration" » "publicaoaaas administration" (Expand Search), "publicooaaas administration" (Expand Search), "publicasoaaas administration" (Expand Search), "publicoaaas administracao" (Expand Search)
"publicosa administration" » "publicaosa administration" (Expand Search), "publicoosa administration" (Expand Search), "publicasosa administration" (Expand Search), "publicosa administracao" (Expand Search), "publicos administration" (Expand Search), "publica 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 ("publicoaaas administration"))) OR ("publicosa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaas administration\"))) OR (\"publicosa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaas administration ))) OR ( publicosa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaas administration"))) OR ("publicosa administration"))*.