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You note that she has your phone number and email address. Do you have hers? You can also try sending her a snail mail letter in care of the college that you think she is attending. If she is there, they will have to get it to her without your having to know her dormitory room number or other detailed address. This doesn't require the college releasing information to you, but postal mail must be delivered if possible. You can also ask your former husband. You really can't tell if he will fill you in if you don't ask.
Snail mail is a letter you write and put a stamp on. You can send it through the post office by certified mail with signature required. That way you will know that the letter was received.
If you can't learn about her from your former husband, or if she is unwilling to answer your emails, you may want to consider hiring a private detective. However, since she is 19, choosing to drink and smoke would be decisions she could make without parental permission.
Please let me know if you have further questions.