Hello DARK army,
I am so sorry for the delay. 🙈🙊
Telegram is currently unable to effectively search in Chinese because Telegram considers an entire Chinese sentence to be a single "word". Since Telegram does not support partial word searches, searching for a Chinese word inside a Chinese sentence will not return a successful result.
I understand this not helpful but please allow me to provide you an alternative solution, hashtags. You can sign or replying to important messages with a hashtag (#). Any word starting with a “#” will be clickable. Tap on a hashtag to get instant search results from your Telegram messages.
I do hope this situation can be rectified in the near future. Here is a technical hashtag for your issue: #issue_2AYOGeCk