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khau thong » khau thuong, khap thong, khau tong
hoc thong » hoc thuong, hoc trong, hoc hong
sach khoa » bach khoa, sach nha, anh khoa
khoa khau » khoa kham, khoa phau, khoa chau
sach tri » sach tai, sach tren, sach bai
thu sach » tu sach, thuat sach, thuoc sach
khoa hoc » hoa hoc
tri thuc » tri tue
te sach » toc sach
tri thu » thi thu, tri phu, tri tu
thuc da » thuc dan, thuc day, thuc dia
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