Well, the main thing that looks Basenji-ish about her is her general shape…and that is common among many breeds of what we call "pariah" or "primitive" breeds. She doesn't have some of THE hallmark breed traits like white feet and chest, curled tail, being a smallish dog. Usually, even in mixed breeds those things come thru. The sneezing thing is not particularly basenji. Many dogs sneeze as a calming signal when they are mildly nervous, or being reprimanded.
It *would be pretty unlikely for her to be a Thai Ridgeback, as there just aren't any of those around. But most likely she is several generations of mixed dogs, and her type has kind of gone back to the original primitive dog shape.
Regardless, she is a really pretty dog, and you are welcome here