Amazon search is similarly broken. Try to find an ECC DIMM on Amazon. Everything I try results in dozens of listings for non-ECC DIMMs. Even searching for " ECC" doesn't work all that well. It's sad that in these days of advanced neural networks, we can't get a simple binary attribute matched correctly in search results.
I guess it's location based too (like Google is). Searching for "ECC DIMM" returned a bunch of actual ECC memory chips available to ship overseas on the first page of results on Amazon.com, though I'd still suggest being more specific when searching for ECC RAM myself (eg. RDIMM or UDIMM or...).
I did, and that helped a little, but it's just sad that what should be a solved problem by now isn't. Nearest neighbour search is so not helpful to me in many cases.
