Ducttape the Ducttape
Python 2, 224 bytes
from difflib import SequenceMatcher
def similar(a, b):
    return SequenceMatcher(None, a, b).get_matching_blocks()
a=raw_input()
b=raw_input()
for start, _, size in similar(a, b):
 if(size &gt; 9):
  print a[start:start+size]

Copied from this answer:
from difflib import SequenceMatcher
def similar(a, b):
    return SequenceMatcher(None, a, b).

get_matching_blocks() is copied from this answer
a=raw_input()
b=raw_input()

is copied from this question
for start, _, size in is copied from this answer and the second occurence of similar(a, b) is copied from the same place as the first.
if(size &gt; 9) is copied from this question.
:
    print

is copied from this question
a[start: is copied from this answer.
and finally, start+size] is copied from this questipn
Finally answered after one and a half years ...