It's normal not to bleed after take abortion pills?or doesn't work because i didn't bleed at all?

Taking mifipristone/misoprostol (800 mg and 200 mg respectively) may not cause a "chemical abortion" 100% of the time, especially if taken at around or later than "10w of pregnancy". If no evidence of bleeding in a few more days occurs, obtain a serum HCG test to be certain you are not still pregnant, and if positive, consult your GYN physician for guidance.