The small green weed is a Phyllanthus urinaria which I posted before. The one with darker green round leaves with an opposite arrangement and red stems could be Euphorbia maculata (synonym: Chamaesyce maculata; common name: Spotted Spurge, Prostrate Spurge, Spotted Sandmat; Family: Euphorbiaceae) and an unknown but common weed. Could it be a Euphorbia too? See, I don't know everything or all the plants.
Anyway, several links on the E. maculata are found below: