Search for errors

The text you are searching for appears as part of the diamond helmet's name in Chinese Simplified, so it should come up in the search results. What exactly is the problem described here?

When you search for "石头" (stone in English), a diamond helmet will appear.Diamond helmets should not appear in the list

So if I'm understanding this correctly, you are reporting that the Chinese Simplified translation of the diamond helmet should be changed?

No, I mean the diamond helmet shouldn't be searched

Why though? Since the translation contains those characters, and you don't want the translation changed, why exactly shouldn't the diamond helmet appear in the search results?

Because in Chinese Simplified, the word "石头"(stone) does not mean "钻石头盔"(diamond helmet).I want to remove the diamond helmet when searching for "石头".

钻 石头 盔, I don't see the issue.

Other items also contain "石" for why these can't be found

This is the expected behavior. If I search for "stone", I will get results for "stone" and "sandstone" too, because it contains that set of characters in that specified order. You might as well complain about "Redstone Comparator" popping up when you search for "stone".