Use instr()
Ex:
1234567
ABCD_FG
x= ABCD_FG
Pretend the _ is space. Space is on the fifth of the term (x).
Instr(x, "_") will give you 5. Add 1 to 5 and you got the beginning of the second word
"FG"
So now you can use MId(x, (instr(x,"_")+1))
Just replace "_" with " "