Good luck with that = viel Glück damit
Viel Glück !
bad luck in German language mean[pech]
"Viel Glück Kinder" would be the right phrase.
Viel glück und bis bald ( wiedersehen)
German: Viel Glück French: Bonne chance Italian: Buona fortuna
The German expression "viel Glück" means "Good Luck".
"Glück" is the word you are looking for.
Viel Glück!
"Viel Glück" means "Good luck".
Viel Glück
good luck- powodzenia