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khoa thon » khoa than, hoa thon, khoa thuoc
khoa khoa » hoa khoa, khuan khoa, khoa hoc
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
hoa thong » hoa trong, hoa khong, hoa thon
sach tri » sach tai, sach truc, sach bai
tri thuc » tri tue
thuc cac » thuc cach, tuc cac, phuc cac
cac khoa » cac khoan, cac khoi, dac khoa
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
cac thi » cac thoi, cau thi, can thi
thi hoa » thi hoan, thi ha, thi hong