Sorry if this has already been asked or mentioned but how old is your little girl? I have had other dogs before my Yorkie Chloe and it was SOOO easy to train the other dogs. Even my first dog was very well trained by 6 months old. I have noticed that Yorkies (not just mine) are more of a challenge to train. I know it can be frustrating for you when you are trying so hard but she will come around. With Chloe I just kept a good sense of humour and laughed when she was being a stubborn little bugger lol. They are a stubborn and headstrong breed but what a delight the are too. It took me over a year to get Chloe to respond to my commands, it was almost as if she was testing me to see if I could be trusted lmao. Once she was totally bonded with me (now sometimes almost to the point of ridiculous lol) it was as if she wanted to do anything I wanted her to do. She has become such a wonderful companion and is now so loyal and eager to please. So dont worry it will come in time
