Perhaps you should try some spelling variations:
prof{acute}tacticas » prof{acute}practicas
peron{acute}eticas » ceron{acute}eticas, peron{acute}eticos, pedron{acute}eticas, perun{acute}eticas
pero{acute}activa » pedro{acute}activa, peru{acute}activa, pero{acute}active
prod{acute}tactica » proud{acute}tactica, pro{acute}tactica, prol{acute}tactica, prod{acute}practica

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: ((prof{acute}tacticas OR peron{acute}eticas) OR (pero{acute}activa OR prod{acute}tactica)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((prof{acute}tacticas or peron{acute}eticas) or (pero{acute}activa or prod{acute}tactica)) ;*.