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thuyet canh » thuyet anh, thuyet can, thuyet kinh
tri thuyet » li thuyet, bai thuyet, tre khuyet
sach tren » sach tien, sach tranh
bach khoa » anh khoa
hoc thong » hoc thuong, hoc trong, hoc hong
canh khoa » anh khoa, xanh khoa, doanh khoa
pho thong » he thong
tren thi » trien thi, tran thi, trieu thi
thi bach » thi bich, thi hanh, thi anh
khoa hoc » hoa hoc
sach tri » sach tai, sach truc, sach bai
khoa pho » khoa phu, khoa khoa, khoa phau
tu sach » thu sach, su sach, te sach