why do you use "from" that not with or to?
That's just how it is in English. To distinguish x from y or to tell apart x from y.
To distinguish a to z means to distinguish everything from a to z (a b c... x y z).
To distinguish with means to distinguish something using something.
phân biệt = 分别
"voi" does not mean "from", it means "with" or so I am taught.
The translation is now; He wants to distinguish me with her.