Perhaps you should try some spelling variations:
"perea y psicoanalisis de genetica." » "perea y psicoanalisis en genetica.", "perea y psicoanalitico de genetica.", "perea y psicoanalisis la genetica.", "perez y psicoanalisis de genetica.", "pere y psicoanalisis de genetica."
"varelo el psicoanalisis y epigenetico." » "varelo el psicoanalisis y epigenetica.", "varelo el psicoanalisis la epigenetica.", "varelo el psicoanalisis y genetico.", "barcelo el psicoanalisis y epigenetico.", "varela en psicoanalisis y epigenetico."

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 de genetica.") or ("varelo el psicoanalisis y epigenetico."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("perea y psicoanalisis de genetica.") OR ("varelo el psicoanalisis y epigenetico."))*.
• Removing quotes may allow a broader search: (( perea y psicoanalisis de genetica. ) or ( varelo el psicoanalisis y epigenetico. ))*.