Perhaps you should try some spelling variations:
pro{acute}iactivas » prof{acute}iactivas, pro{acute}inactivas, pro{acute}activas, pro{acute}bioactivas
prod{acute}cticas » profd{acute}cticas, prof{acute}cticas, prol{acute}cticas, prot{acute}cticas, prod{acute}acticas, prod{acute}icticas, prod{acute}eticas
proud{acute}actica » profud{acute}actica, proud{acute}tactica, proud{acute}lactica, proud{acute}activa
pero{acute}iaticas » pedro{acute}iaticas, peru{acute}iaticas, pero{acute}aticas, pero{acute}asiaticas, pero{acute}bioticas

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}iactivas OR pero{acute}iaticas) OR prod{acute}cticas) OR proud{acute}actica) ;~.
• Adding a wildcard symbol may retrieve word variants: (((pro{acute}iactivas or pero{acute}iaticas) or prod{acute}cticas) or proud{acute}actica) ;*.