import re
from pprint import pprint

pattern = r"\b(?=[A-Za-z0-9]{8})[A-Za-z]*\d[A-Za-z\d]*\b"
s = "https://stackoverflow.com/questions/59800512/ 510557XXXXXX2302 Normal words 1601371803 NhLw6NlR0EksRWkLddEo7NiEvrg https://www.google.com/search?q=some+google+search&oq=some+google+search&aqs=chrome..69i57j0i22i30l8j0i390.4672j0j7&sourceid=chrome&ie=UTF-8"

pprint(re.findall(pattern, s))