In OpenGrok how to search a substring?

Question

I have a source file that contains statement like:

    CRITICAL_MSG("\tprobe and attach devices\n");

but

• by typing "probe and attach devices" I cannot find the string in the "full" field
• by using wildcards "\*probe and attach devices\*" doesn't work as well.

If I input the exact string and the (escaped) backslash: "\\\tprobe and attach devices\\\n" it works but it's not very reliable because it is expected to know the exact formatting of the string.

So how to find this string?