You could try to use to return everything after the second space:
If you are only looking for the expression then replace space with the text:
Let me know if this helps.
i did that but it didn't wor:
MID([Product Description],FIND([Product Description],"PORTABLE SAMSUNG",2))
result : PORTABLE SAMSUNG GALAXY J1 ACE
Did you try using the function "FINDNTH"? This will return the position where to split the text. The "2" in your formula returns the second occurrence of the substring as opposed to the first, so it should read "1"
MID([Product Description],FINDNTH([Product Description],"PORTABLE SAMSUNG",1))