'No matter' is a bit difficult to translate. I guess the closest that I can think of is "Tidak peduli" but literally this is actually translated to " Couldn't care less". So : "No matter how hard I try, she will never be satisfied." translated to : "Tidak peduli seberapa besar usaha saya, dia tidak pernah akan puas" Hope that helps

"Tidak peduli seberapa besar usaha saya, dia tidak pernah akan puas" is correct reffered to the english translation. "Bagaimanapun besarnya usaha yang saya lakukan, dia tidak akan pernah merasa puas" - it sounds more natural, but still formal. :)

I think the simple translation : "Tidak apa-apa", literally it means "it`s okay" What do you think?