texas search angel

I have been looking for a sister for a long time. When we were split up she went to live with her dad and i went to live with our grandpa in another state. She was two and I was five. I have her b-date and her fathers name. my grandpa past away before i could ask any questions. Like alot of people i have looked everywhere on the net. Counld you give me of advice? Thank you Alexis Milton:)