Perhaps you should try some spelling variations:
psicoanalisis una » psicoanalisis en, psicoanalitica una, psicoanalisis de
y psicoanalisis » el psicoanalisis
una epigenetica » la epigenetica, y epigenetica, clave epigenetica
perez y » perez a
tarea y » tareas y, tarea de
genomica. » genoma.

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: (( perez y psicoanalisis una epigenetica. ) OR ( tarea y psicoanalisis y genomica. ))~.
• Adding a wildcard symbol may retrieve word variants: (( perez y psicoanalisis una epigenetica. ) or ( tarea y psicoanalisis y genomica. ))*.