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sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
sach truc » cach thuc, sach tren, sach thu
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa pho » khoa phu, khoa khoa, khoa phau
truc hoc » trac hoc, tru hoc, truc hoa
dan khoa » dang khoa, da khoa, san khoa
te sach » toc sach
tu sach » thu sach, su sach, tu cach
khoa he » hoa he, khoa hoc, khong he
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