Bright Insight's test fails on Freespoke.com also. Only Yandex.com does not fail among major search engines. I had been using Neeva until I realized that they do the same thing since they just pool results from the other major engines. You may also try Searx and Yacy, they do not fail in this way as they are peer to peer and not run for profit by our tech overlords, but they are pretty slow compared to Yandex.
https://www.youtube.com/watch?v=8O_NvPpbsbw
Bright Insight's test fails on Freespoke.com also. Only Yandex.com does not fail among major search engines. I had been using Neeva until I realized that they do the same thing since they just pool results from the other major engines. You may also try Searx and Yacy, they do not fail in this way as they are peer to peer and not run for profit by our tech overlords, but they are pretty slow compared to Yandex.