Foxseiz :
I mean, can I combine those 2 ssd to be one?
You can by using raid-0.
That assumes that the second ssd is of the same size and you will need to reinstall the os on the new array.
I do not recommend this. There is no performance gain except for synthetic benchmarks .
Reliability is less by adding more parts that can fail.
If your new ssd is larger, You can clone your current ssd to it.
Intel and Samsung offer free clone utilities to do that with their drives.
After, you can repurpose your old ssd as a second fast sata drive.