I use the following lense all the time:
https://kagi.com/lenses/AkWUsQ4GDAytwwgZjuwtm47uFPmktPTO
It allows for a search through a reddit.com webiste. No other criteria is defined.
Similar behavior is while searching on other sites like youtube.com.
Search for "jesse michels" shows only reddit.com results.
Search for "peter thiel" shows reddit.com + zhihu.com results.
Search for "jessee michels" shows reddit.com + results from 14 other domains.
Search for "jessee michels peter thiel" shows only reddit.com results.
Search for "jesse michels peter thiel" shows reddit.com + results from 12 other domains.
Other domains that are included in searches and shouldn't be are youtube.com, podpulse.ai, cgaa.org, apple.com, cinando.com and others.
Similarily searching "jesse michels peter thiel" through the "Forums" default lense retrieves results that are clearly not from forums, sites include: youtube.com, washingtonpost.com, podcasts.apple.com.
Searching the same phrase through the "Academic" default lense retrieves results from reddit.com, youtube.com, podpulse.ai.
The PDF lense is the only one that seems to work decently on that phrase - all of the results are really pdfs.
From the docs:
"Kagi Lenses allow you to customize your searches by specifying which websites (and other parameters) you see in your results.
(...)
Academic: searches education (.edu) domains.
(...)
Forums: search forums from around the web."
