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)
"publicos administration" » "publicaos administration" (Expand Search), "publicoos administration" (Expand Search), "publicasos administration" (Expand Search), "publicos administracao" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search), "publica administration" (Expand Search)
"publicosaa administration" » "publicaosaa administration" (Expand Search), "publicoosaa administration" (Expand Search), "publicasosaa administration" (Expand Search), "publicosaa administracao" (Expand Search), "publicoaa administration" (Expand Search), "publicasaa administration" (Expand Search), "publicaaa 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 ("publicos administration"))) OR ("publicosaa administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicos administration\"))) OR (\"publicosaa administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicos administration ))) OR ( publicosaa administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicos administration"))) OR ("publicosaa administration"))*.