Perhaps you should try some spelling variations:
communication cohesion » communication collections, communication control, communication cost
basics dimension » basic dimensions, based dimension, asian dimension
cohesion basics » cohesion based, compression basics, combustion basics
e rivera » _ rivera, e ricerca
m rivera » _ rivera, 5 rivers

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• Performing a fuzzy search may retrieve terms with similar spellings: communication cohesion basics dimension ((e rivera) OR (m rivera))~.
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