Due to the sheer number of ERC20 tokens out there, in some rare scenarios, the token may not appear on the trust wallet search box.
Here are the steps that you can do to manually add the tokens.
STEP 1. Download Trust Wallet
https://trustwallet.com/download-page for your mobile phone or desktop
Tap on the toggle sign on the upper right corner of the Wallet Screen. Search for the token, and if the token is not available, you will get a “No Asset Found” screen with the Add Custom Token button. If you get several same ticker symbols then you will need to get the token info from the airdrop pages to make sure you have the right token/coin.
For Android devices, you can scroll down to the bottom of the list of available tokens and you will see there
+ Add Custom Token.
Take note of the Token Name, Symbol, Contract Address and Decimal from the airdrop page.
Using the information taken from Etherscan or the airdrop page, carefully fill up the required Token details. Tap on Done once you are done.
On the main wallet screen, the token will now appear. Since this is still a new token, the logo as well as the price will not be available. Get your wallet address