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khan thong » khap thong, khau thong, nhan thong
sach kien » sach tien, mach dien, sach kinh
thuc cach » thuoc sach, truoc cach, tuc cac
cach khoa » bach khoa, cac khoa, cac khoan
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
hanh kho » hanh khu, hang khoa, hanh theo
kho khan » khoa kham, khoa than
tu sach » thu sach, su sach, te sach
khoa he » hoa he, khoa hoc, khong he
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