Application of Borax mixture
Creeping charlie (Glechoma hederacea) is a very common lawn weed. There are few chemical treatments available for it as it is largely resistant. Borax is sometimes cited as a "natural" control, but "natural" does not mean "safe." And in this case it is not advised to be used. Borax persists in soil for a long time and can have negative affects on insects. And it is not proven to be an effective herbicide against Creeping charlie. Other than using a broad spectrum herbicide such as glysophate which will kill the weed and all grass, your only other option is mechanical removal: you can either be persistent in digging out the plants, being sure to remove the roots (not easy) or skim off weeds and grass. Replace with a thin layer of new soil and compost and reseed the grass in that area.