Perhaps you should try some spelling variations:
information propagation » information presentation, information organization
propagation middle » propagation model, propagation models, propagation dipole
dimension methods » dimension method, dimensional methods, dispersion methods
middle dimension » simple dimension, people dimension, time dimension
methods links » methods linda, methods line, methods linear

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• Performing a fuzzy search may retrieve terms with similar spellings: information propagation middle dimension methods links~.
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