Perhaps you should try some spelling variations:
registros sonicos » registros clinicos, registros medicos, registros semioticos
registro medicos » registros medicos, registro unico
registro medica » registros medicos
en estadistica » la estadistica, de estadistica
medica y » medicina y, medica en, medica de
medico » medicion
medicos » medicions

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( registro medica y estadistica de salud ) OR ( registro medico y estadistica de salud ))) OR ( ((registro medicos) OR (registros sonicos)) en estadistica de salud ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( registro medica y estadistica de salud ) or ( registro medico y estadistica de salud ))) or ( ((registro medicos) OR (registros sonicos)) en estadistica de salud ))~".
• Adding a wildcard symbol may retrieve word variants: (((( registro medica y estadistica de salud ) or ( registro medico y estadistica de salud ))) or ( ((registro medicos) OR (registros sonicos)) en estadistica de salud ))*.

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