How to find multiple strings between tag/sub-strings?

Generally, you don't want regex to parse (X)HTML (more info in this answer) Better option is using a parser. This example is with beautifulsoup:

data = '''text = 'Bring me to <xxx>ibis and the</xxx> in <ccc>NW</ccc> and the <sss>Jan</sss>
<hhh>10</hhh>'''

from bs4 import BeautifulSoup

soup = BeautifulSoup(data, 'html.parser')

for tag in soup.select('xxx, ccc, sss, hhh'):
    print(tag.get_text(strip=True))

Prints:

ibis and the
NW
Jan
10

EDIT: To get whole tag string:

for tag in soup.select('xxx, ccc, sss, hhh'):
    print(tag)

Prints:

<xxx>ibis and the</xxx>
<ccc>NW</ccc>
<sss>Jan</sss>
<hhh>10</hhh>

EDIT II: If you have list of tags to find:

list_of_tags = ['xxx', 'ccc', 'sss', 'hhh']
for tag in soup.find_all(list_of_tags):
    print(tag)

EDIT: In case of malformed HTML it's necessary to change the parser:

data = '''text = 'Bring me to <xxx>ibis and the in NW</ccc> and the <sss>Jan</sss>
<hhh>10</hhh>'''

from bs4 import BeautifulSoup

soup = BeautifulSoup(data, 'lxml')

list_of_tags = ['xxx', 'ccc', 'sss', 'hhh']
for tag in soup.find_all(list_of_tags):
    if tag.find_all(list_of_tags):
        continue
    print(tag)

Prints:

<sss>Jan</sss>
<hhh>10</hhh>