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hoc sach » hoc sinh, hoc cac, hoc anh
doc sach » toc sach, nuoc sach, dac sac
tri thuc » tri tue
thuc anh » thuc hanh, thuy anh, thu anh
tu sach » thu sach, su sach, te sach
khoa he » khoa hoc, khong he, khoa thu
hoc sach » hoc sinh, hoc cac, hoc anh
doc sach » toc sach, nuoc sach, dac sac
tri thuc » tri tue
thuc anh » thuc hanh, thuy anh, thu anh
tu sach » thu sach, su sach, te sach
khoa he » khoa hoc, khong he, khoa thu
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