try for a visit visa, you can sponsor her, shes got a good reason to go back to finish her uni course,
but get your app right, or like many it will end in refusal..
yeah im so eager to get her a visit visa, i really want here with me but i don't know what's the first thing to do and especially about the invitation letter what's the format of it?? I am so ignorant about this stuff. :( Thanks for your message!!