Could not search for Chinese word

Please, this issue makes me crazy.

step to reproduce:

1. goto webpage https://blogec.blogchina.com/501108926.html

2. highlight the second paragraph, see picture 1

3. go to memex dashboard, and you can see the page is saved, see picture 2

4. search for highlight "微软第三财季营收" which is the beginning of the highlight, but no result is shown! see picture 3

picture 1

picture 2

picture 3