I am not sure what captcha are you talking about, when i type something on that upper right corner box and hit enter, it leads me directly to the results without advanced search or any captchas, perhaps on your end its showing captcha because you are not signed in to the website hmmm. OK let me forward you the source code after i search from that quick search for example i will search for "duck", here is the source code: https://pastebin.com/cFYNAEDr