# 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)