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dai khoan » dai khoang, dai khoa, tai khoan
khoan hoi » khoan nhoi, khoa hoi, khoa hoc
hoi thong » hoi thuong, hoi trong, hoa thong
sach sinh » sach kinh, sach danh, sach song
sinh nhan » minh nhan, ninh nhan, trinh nhan
nhan cach » phan cac
cach khoa » bach khoa, cac khoa, cac khoan
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
thuc dai » thuc dan, thuc day, thuc tai
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
khoa he » hoa he, khoa hoc, khong he