All 3 of these weeds will be better controlled with a broadleaf combination containing triclopyr. Violet might take multiple applications still. Look for Ortho Clover, Chickweed, and Oxalis Killer (CCO). It is straight triclopyr and can be applied alone or combined with your other weed b gon mix.
#3, does this have a common name? I have some old memory of another name...and being told its edible? Maybe I was just a little kid eating grass..? haha