Perhaps you should try some spelling variations:
"responsabilidad civil del suministrador" » "responsabilidad civil del administrador" (Expand Search), "responsabilidad civil del administrado" (Expand Search), "responsabilidad civil el administrador" (Expand Search)
"responsabilidad civil de suministrador" » "responsabilidad civil del administrador" (Expand Search), "responsabilidad civil de suministro" (Expand Search), "responsabilidad civil de suministros" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("responsabilidad civil del suministrador") OR ("responsabilidad civil de suministrador"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"responsabilidad civil del suministrador\") OR (\"responsabilidad civil de suministrador\"))".
• Removing quotes may allow a broader search: (( responsabilidad civil del suministrador ) OR ( responsabilidad civil de suministrador )).
• Adding a wildcard symbol may retrieve word variants: (("responsabilidad civil del suministrador") OR ("responsabilidad civil de suministrador"))*.