QDateTime::fromString does not accept Qt::TextDate format from toString() in Vietnamese locale

Looks like the output from toString() looks like:

"Th 2 thg 11 16 14:05:44 2020"

But this is not accepted by fromString() because there are spaces in the day (Th 2) and month (thg 11) names. fromString() splits the input string by space, so it doesn't get the expected result it is hoping for and returns invalid date.