Try different Press Archives offered by Whitepages.com.bo
Every Archive has different results ...
Press Archive by Bolivian Express.org
Press Archive by Correo del Sur.com
Press Archive by El Deber.com.bo
Press Archive by El Diario.net
Press Archive by Elpotosi.net
Press Archive by La-razon.com
Press Archive by Lostiempos.com
Press Archive by Opinion.com.bo
Press Archive by Paginasiete.online
search in another country
Phone Book of the World.com
Annuaire du Monde.com
maybe the person you are looking for has moved
and can be found through the directory of another country
good luck ...
