First you have to do the leg work to find the matches to use in the chromosome browser and DNA painter tool.
If your mother or anybody from her generation on the same line is available for testing, it could give you closer results. Or anyone from any generation on that line, to make use of shared matches, i.e. known cousins or 2nd cousins.
You may have an uphill job. You are looking for two unknown people out of 32 of your mother's ancestors, and 2 out of 64 of your ancestors.
My 5th to 8th cousins at ancestry, especially those sharing only 6 cMs and of American origin, are likely to be false matches. However, I think that most if not all of the 4th to 6th cousins may be valid, if only I could find the connection.
However, I only positively match with 55 out of my 193 4 to 6 or closer cousins (not a high success rate, but worthwhile to me).
Only one of my 2G grandparents is unknown, I have found only one potential match so far who could possibly be the link.
So the answer to your question is no, I have had no luck because I only have one possible candidate to compare with.
If you have 2 or 3 matches you think likely, browser or painter may still not be the initial thing to do, rather explore these matches, see if they know how they are connected, etc, etc.
Regards Margaret