Weeds that are difficult to eradicate

It's been a week since I eradicated a lot of weeds in the yard, but so far there are no signs of miscarriage on this plant, but I think that the pesticide I used to spray it is not effective against the grass.

Usually, the miscarriage period of weeds reaches 15 days, all of them have died, unlike the usual weeds that are growing as if there was no reaction from the spraying I did a few days ago

I should have replaced the effective pesticide that made these weeds die quickly.

thank you
@malawi75