As mentioned here, the probability of getting three 4s is 1/64 :
http://mathhomeworkanswers.org/24627/theoretical-probability
On the other hand, there are too many different outcomes to list all down.
In general the possible types of outcomes are:
1) Same number for all three dices. The number can be from 1 to 4.
2) Same number for two dices, and a different number for the third die.
3) Different numbers for all three dices.