You can:

• use InviZible Pro to request new bridges from the Tor database;
• visit https://bridges.torproject.org/ and follow the instructions;
• contact @GetBridgesBot in Telegram and type /bridges
• send an email to bridges@torproject.org from your Gmail or Riseup email account, leave the email subject empty and write “get transport obfs4” in the email’s message body;
• if these bridges do not work, email frontdesk@torproject.org to get new bridges;
• use other sources such as Telegram channels, etc.

In any case, you should get bridges like these:

Here are your bridges:

  obfs4 176.250.244.87:2487 2563C0683242FDA2A620821B35BA00182A11CE67 cert=xelYkjVTY45G72AJqSZENWOpJQvt09/qtB0y92ipK2LChMWHClfYGpIzjJqR4JTh32iwAA iat-mode=0
  obfs4 59.167.129.32:8011 2888A5454854B4749137C6AC1DF4A83FA8437689 cert=nuzMHDHn5pogBp59CknCjdaoIxSJKpJkQEubJTX1vbwllMG8uNuAV23D6102LQ8C3gXnDQ iat-mode=0