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thuoc sinh » thu sinh, thuoc sach
tri thuoc » tri thuc, tin thuoc
sinh hoat » sinh hoc, sinh vat
sinh khoa » sinh hoc, anh khoa
sach tri » sach tai, sach tren, sach truc
te sach » toc sach
hoat he » hoa he, hoat ho, thuat he
tu sach » thu sach, su sach, tu cach
tri hoc » triet hoc, tri thuc, thai hoc
khoa he » hoa he, khoa hoc, khong he
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