@Cow In SE search? Not that I'm aware of, but there's at least one possibility I'd try. However, without knowing there's a real match, it's difficult to verify. So, I created a few answers in MSE's Formatting Sandbox, which I used to verify the possibility I was going to try didn't work. As a result, using SE's search page, the only way I'm aware of is to manually, or write code to programmatically, look at each of the entries after doing the "paytm" search. SEDE might be able to help, if you want a limited search, as a full search of the body, at least on SO, will time out. If I was doing it, and I didn't just give up after looking at a few example results, I'd probably try an SE search first, then figure out which sites have hits, or at least the main portion of the hits. Then, I'd use the SE API endpoint
/search/excerpts
, which is the one that will search in both questions and answers, searching for "paytm", including the
body
in the results. Two searches per site would be needed, one for the text in titles, then another for it in bodies. I'd then take those results and search for "paytm=" (which could be done programmatically, or just in the browser from results on the
SE API example page. Basically, it's a pain in the rear.