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khan thong » khap thong, khau thong, nhan thong
tri thuoc » tri hoc, tin thuoc
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
thuc cach » thuoc sach, truoc cach, thuc hanh
cach khoa » bach khoa, cac khoa, cac khoan
hoc thong » hoc thuong, hoc trong, hoc hong
sach tri » sach tai, sach tren, sach truc
kho khan » khoa kham, khoa than
tri thuc » tri tue
khoa hoc » hoa hoc
tu sach » thu sach, su sach, te sach
anh kho » anh khoa, anh tho, anh cho