Fishy business.... @ Jurong West, Singapore https://t.co/CMZZLn8RqY
<a href="http://instagram.com" rel="nofollow">Instagram</a>
West Region
[{'url': 'https://t.co/CMZZLn8RqY', 'expanded_url': 'https://www.instagram.com/p/B_kBIYOnkel/?igshid=jtuq6q23yxig', 'display_url': 'instagram.com/p/B_kBIYOnkel/…', 'indices': [44, 67]}]
HONG KAH
['fishy', 'business', '...', 'jurong', 'west', 'singapore', 'https://t.co/cmzzln8rqy']
[]
fishy business west
fishy business jurong west singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance reports."},
    ]

It seems that the Twitter post you provided does not relate to a maintenance report feedback for a public flat house in Singapore. The term "fishy business" could potentially refer to a variety of things, but it does not seem to be related to any specific issue or problem in a public housing context.