Perhaps you should try some spelling variations:
pro{acute}cticas » pro{acute}acticas, pro{acute}icticas, pro{acute}eticas
pero{acute}ieticas » pedro{acute}ieticas, peru{acute}ieticas, pero{acute}eticas, pero{acute}beticas, pero{acute}teticas
prod{acute}practica » proud{acute}practica, prol{acute}practica, prot{acute}practica
prof{acute}actina » prof{acute}activa, prof{acute}acting

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: ((pro{acute}cticas OR pero{acute}ieticas) OR (prod{acute}practica OR prof{acute}actina)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((pro{acute}cticas or pero{acute}ieticas) or (prod{acute}practica or prof{acute}actina)) ;*.