tốn nhiều 
to cost much, be very costly [ tốn ] : to cost, be costly; to spend, use, pay for
[ nhiều ] : much, many, a great deal, plentiful, often, numerous, abundant, a great deal
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
| Intermediate -Advanced: 2591 (pronoun: itself, in itself)  The job itself is not difficult, it's just time-consuming.  Der Job selbst ist nicht schwierig, er ist nur zeitaufwändiger. Bản thân công việc không khó, chỉ tốn nhiều thời gian hơn. |
tốn nhiều thời gian to be time consuming, take a lot of time