bởi nhiều lý do 
for many reasons [ bởi ] : because of, on account of, by (means of)
[ nhiều ] : much, many, a great deal, plentiful, often, numerous, abundant, a great deal
[ lý ] : physics; reason, principle, law
[ do ] : because of, caused by, due to; derived from; on; by (a person); to derive from, cause
Most Common Compounds Set 1:
Most Common Compounds Set 2 :