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