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