Search C # and C ++ for Habrahabr

We try:
habrahabr.ru/search/?q=c%23
habrahabr.ru/search/?q=c#
habrahabr.ru/search/?q=C%2B%2B
habrahabr.ru/search/?q=C++
Result: “Surprisingly, the search did not return results”
Indeed, amazing ...
It is also noted, for example, that C # does not affect the results, well, for example, C # Books

PS Sphinx?