một số các 
a number of [ một ] : one; a, an
[ số ] : (1) amount, number, figure, quantity, size (of clothing), digit, edition; digital; (2) gear (of a car); (3) destiny, fate, lot
[ các ] : (1) (pluralizer); these, various; (2) council chambers; (3) card; (4) to pay (additionally) as part of a deal
Most Common Compounds Set 1:
Most Common Compounds Set 2 :