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khoa thong » hoa thong, thoai thong, pho thong
hoc tieng » hoc hien
sach thi » sach thu, sach tai, sach thieu
tam cach » tap cach, tham canh, va cach
cach hoc » cach thuc, cach thoi, dich hoc
hoc khoa » hoc pho
thu sach » thuat sach, thuoc sach, thu hoach
sach tri » sach tai, sach tren, sach truc
tri phan » tri nhan, tai phan, trinh phan
phan cac » nhan cach, phan dau, phan lap
cac khoa » cac khoan, cac khoi, dac khoa
khoa hoc » hoa hoc
tu sach » su sach, te sach, tu cach
thi tam » thi thao, thi tran