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toan thuong » toan thong, ton thuong, than thuong
thuong minh » thong minh, truong minh, thuong binh
phong minh » thong minh, khong minh, phong tinh
giai toan » giai doan, giai toa, gioi toan
hoc sach » hoc sinh, hoc cac, hoc anh
sach dao » lanh dao
co phong » cao phong, mo phong, o phong
tu cach » tu cac
cach ba » cach bao, cac ba, cach ta
me giai » de giai, ve giai, ke giai
giai co » giai cao, gian co, gioi co
dao me » dam me, dao ve, dao le