Perhaps you should try some spelling variations:
cognitive differentiation » competitive differentiation, effective differentiation, continuity differentiation
methods multidimensional » metric multidimensional, towards multidimensional, based multidimensional
differentiation methods » differentiation between
array string » array strong, arrays strings, array sharing
array along » arrays long, array arcing, array paving

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• Performing a fuzzy search may retrieve terms with similar spellings: cognitive differentiation methods multidimensional ((array along) or (array string))~.
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