- fill keyword in 线标题+开线人 alone to find threads only
- fill user in 发帖人 alone to find all posts by the user
- fill text in 帖文 alone to find all posts containing it
- use more than one in above three to narrow down results
- use [用户] as 开线人/发帖人 to match exactly the user 用户
- limit results by adjusting 开线日/总帖数 range slide
- press arrow keys to adjust 开线日/总帖数 one at a time