Perhaps you should try some spelling variations:
"varela del psicoanalisis y genetica." » "varela el psicoanalisis y genetica.", "varela y psicoanalisis y genetica.", "varela de psicoanalisis y genetica.", "marcela del psicoanalisis y genetica.", "varela del psicoanalisis la genetica.", "varela del psicoanalisis de genetica.", "varela del psicoanalisis y genomica."
"mariela de psicoanalisis y epigenetica." » "mariela el psicoanalisis y epigenetica.", "mariela y psicoanalisis y epigenetica.", "mariela de psicoanalisis la epigenetica.", "marcela de psicoanalisis y epigenetica.", "gabriela de psicoanalisis y epigenetica.", "maria de psicoanalisis y epigenetica."

Try widening your search to All Fields.

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