Gadongta cho minh hoi? khi minh cho 1 cau thu hoc them vi tri moi vi du nhu hau ve DC minh cho hoc them DM khi minh thay cau thu bat dau co them vi tri moi CD, DM minh ngung lai cho tap them vi tri khac nhu MC thi thay vao them 3 vi tri CD, DM, MC thi chi thay cau thu do co CD, MC con DM thi ko con? Gadongta co the giai thich dum minh ko? Cam on cac bai viet bo ich cua gadongta