It should not be that problem I guess.
For example, the English keywords are at least two characters, like "go" (good), we search "go" , "good" can be searched out on the results page.
The same keywords in Chinese are at least two characters too, like this sentence (six chinese characters + one chinese comma + one chinese period ) : "你好，我喜欢你。" (means "Hello,I like you."), You can search for "你好", then this sentence can be searched out.
In the picture I posted last post, I searched for a word composed of two chinese characters："诱人"(means "seductive"), and the result was not found in flarum. Other words in the same title, such as "如何" (How) and "帖子"(Post), they can be searched out successfully.
I just read this Chinese article, is that a possibility that this problem is caused by the difference between Chinese word segmentation mechanisms and English word segmentation mechanisms?
Maybe I should try to change the minimum word length limit of search keywords to 1?