Perhaps you should try some spelling variations:
transformation propagation » information propagation, transformation production, transformation operations
diffraction methods » extraction methods
propagation de » propagation due, propagation des, propagacion de
de diffraction » dlc diffraction, _ diffraction, x diffraction
methods links » methods linda, methods line, methods linear

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• Performing a fuzzy search may retrieve terms with similar spellings: transformation propagation de diffraction methods links~.
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