What is the correct meaning of dhamma, dharma, atta, anatta?

I am unable to understand different meanings of words dhamma, dharma, atta, anatta... Does dhamma means as "path" or "truth" or "teaching" as in Ariyapariyesana Sutta or as "phenomenon" or as "things ? Is dhamma and dharma same? Does atta means 'self' or 'soul' or 'ego' or 'eternal-self' or something else? I have read anatta meaning as 'not-self', does this means as 'not-I' or 'not-me' or 'not-mine' or something else? It is because I have read it's use as different meanings...confusing. What could be the correct translation of "Sabbe dhammā anattā."?