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phan thong » phan thuong, phan hong, phan tong
cach tren » sach tren, cach thien, cach bien
tren thuc » trien thuc, tron thuc, trinh thuc
pho thong » he thong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
khoa phan » hoa phan, khoa than, khoa phau
thuc dai » thuc dan, thuc day, thuc tai
dai khoa » da khoa, tai khoa, dac khoa
khoa pho » khoa phu, khoa khoa, khoa phau
tu cach » tu cac
su sach » so sach, vu sach