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tren nguoi » ten nguoi, truyen nguoi, trien nguon
nguoi sach » nguoi san, nuoc sach
khoan hoc » khoa hoc, khoan hoi, khoan nhoi
hoc thong » hoc thuong, hoc trong, hoc hong
sach tren » sach tien, sach tranh
sach khoa » bach khoa, sach nha, anh khoa
sach dai » sach dao, sach bai, sach dat
dai thuc » dan thuc, dai thu, dai thua
thuc cac » thuc cach, tuc cac, phuc cac
thu sach » tu sach, thuat sach, thuoc sach
so sach » so sanh, bo sach, co sach
khoa he » hoa he, khoa hoc, khong he