Perhaps you should try some spelling variations:
"migrantes culturas andres mexico." » "immigrants cultural andres mexico.", "militantes culturales andres mexico.", "migrantes cultura andres mexico.", "migrantes cultural andres mexico.", "migrantes cultural andreas mexico.", "migrantes culturas mayores mexico.", "migrantes culturas valores mexico.", "migrantes culturas actores mexico."
"migrantes culturas poderes mexico." » "immigrants cultural poderes mexico.", "militantes culturales poderes mexico.", "migrantes cultural poder mexico.", "migrantes culturas jovenes mexico.", "migrantes culturas populares mexico.", "migrantes culturas pobres mexico.", "migrantes culturas poder mexico.", "migrantes culturas mujeres mexico."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("migrantes culturas andres mexico.") OR ("migrantes culturas poderes mexico."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"migrantes culturas andres mexico.\") OR (\"migrantes culturas poderes mexico.\"))".
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• Adding a wildcard symbol may retrieve word variants: (("migrantes culturas andres mexico.") OR ("migrantes culturas poderes mexico."))*.