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hoc thong » hoc thuong, hoc trong, hoc hong
sinh hoat » sinh hoc, sinh vat
hoat khoi » thoat khoi, thuat khoi, hoc khoi
thu sach » tu sach, thuat sach, thuoc sach
sach tri » sach tai, sach tren, sach truc
anh khoa » doanh khoa, hang khoa
khoa hoc » hoa hoc
tri duc » tri du, tri dac, trinh duc
tri hoc » triet hoc, tri thuc, thai hoc
khong » phong
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