Perhaps you should try some spelling variations:
"tarea y psicoanalisis la genetica." » "tarea y psicoanalisis a genetica.", "tarea y psicoanalisis una genetica.", "tarea y psicoanalisis en genetica.", "tarea el psicoanalisis la genetica.", "tareas y psicoanalisis la genetica.", "tarea de psicoanalisis la genetica."
"perea y psicoanalisis y epigenetica." » "perea el psicoanalisis y epigenetica.", "perea y psicoanalisis la epigenetica.", "perea y psicoanalisis y genetica.", "perez y psicoanalisis y epigenetica.", "pere y psicoanalisis y epigenetica."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("perea y psicoanalisis y epigenetica.") or ("tarea y psicoanalisis la genetica."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("perea y psicoanalisis y epigenetica.") OR ("tarea y psicoanalisis la genetica.")).
• Removing quotes may allow a broader search: (( perea y psicoanalisis y epigenetica. ) or ( tarea y psicoanalisis la genetica. )).
• Adding a wildcard symbol may retrieve word variants: (("perea y psicoanalisis y epigenetica.") or ("tarea y psicoanalisis la genetica."))*.