# import necessary libraries
import pandas as pd
import numpy as np
import re
# define your series
series = pd.Series(['apple', 'banana', 'cherry', \
'plum', 'orange'])
# create boolean array using re
bool_arr = np.array([True if
len(re.findall('[aeiou]', word)) >= 2
else False
for word in series])
# filter the words using boolean array
words = series[bool_arr].tolist()
# print filtered words
print(words)