Perhaps you should try some spelling variations:
communication conversion » communication conversation, communications convention, communication cohesion
dimensions usage » dimensions age, dimensions image, dimensions use
conversion fast » conversion based, conversion chart, conversion from
fast dimensions » fast dimension, hat dimensions, fast dimensioning
usage pattern » usage patterns, use pattern

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• Performing a fuzzy search may retrieve terms with similar spellings: communication conversion fast dimensions usage pattern~.
• Adding a wildcard symbol may retrieve word variants: communication conversion fast dimensions usage pattern*.