Perhaps you should try some spelling variations:
"cassel, dog" » "cassell, dog" (Expand Search), "cassely, dog" (Expand Search), "casser, dog" (Expand Search), "casel, dog" (Expand Search), "causel, dog" (Expand Search), "passel, dog" (Expand Search)
"casse, dog" » "case, dog" (Expand Search), "cause, dog" (Expand Search), "passe, dog" (Expand Search)