Perhaps you should try some spelling variations:
communication documentation » communication communication, communication conversation
communication foundation » communication education, communication communication, communication information
based dispersion » wave dispersion, gas dispersion, based discussion
dispersion test » dispersion dns, dispersion its, dispersion part
test lime » test time, test line, test clive

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• Performing a fuzzy search may retrieve terms with similar spellings: ((communication documentation) OR (communication foundation)) based dispersion test lime~.
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