Talvez debería tentar con algunhas variantes ortográficas:
communication introduction » communications introductory, communication information, communication satisfaction
introduction theorems » introduction theories, introduction theory, introduction terms
theorems division » theorem diffusion, theorems session
code linear » codes linear, model linear, some linear
odes linear » codes linear, models linear, modules linear
time linear » simple linear

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• Performing a fuzzy search may retrieve terms with similar spellings: communication introduction theorems division ((((code linear) or (odes linear))) or (time linear))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: communication introduction theorems division ((((code linear) OR (odes linear))) OR (time linear)).
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