đa tầng 
multilayer, multilevel [ đa ] : much, many, multiple, multi-
[ tầng ] : story, floor layer, stratum, stage (of a rocket)
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
tiếp thị đa tầng multilevel marketing đa tầng multilayer, multilevel tiếp thị đa tầng multilevel marketing