# import necessary libraries
import pandas as pd
# define your series
series = pd.Series(['apple', 'banana', 'cherry', \
'plum', 'orange'])
# using Python count method
words = [word for word in series
if word.count('a') + word.count('e') + \
word.count('i') + word.count('o') + \
word.count('u') >= 2]
# print filtered words
print(words)