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 poderes mexico.", "migrantes culturas actores mexico."
"migrantes culturas valores mexico." » "immigrants cultural valores mexico.", "militantes culturales valores mexico.", "migrantes cultural values mexico.", "migrantes cultural autores mexico.", "migrantes cultura andres mexico.", "migrantes culturas mayores mexico.", "migrantes culturas valores etica.", "migrantes culturas valores eticos."

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