Perhaps you should try some spelling variations:
"perez y psicoanalisis de genetica." » "perez y psicoanalisis y genetica.", "perez y psicoanalitico de genetica.", "perez y psicoanalisis la genetica.", "perez a psicoanalisis de genetica."
"tarea el psicoanalisis en epigenetica." » "tarea el psicoanalisis y epigenetica.", "tarea el psicoanalisis la epigenetica.", "tarea el psicoanalisis en genetica.", "tarea del psicoanalisis en epigenetica.", "tarea en psicoanalisis en epigenetica.", "tarea es psicoanalisis en epigenetica."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("perez y psicoanalisis de genetica.") or ("tarea el psicoanalisis en epigenetica."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("perez y psicoanalisis de genetica.") OR ("tarea el psicoanalisis en epigenetica."))*.
• Removing quotes may allow a broader search: (( perez y psicoanalisis de genetica. ) or ( tarea el psicoanalisis en epigenetica. ))*.