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cach thien » cach thiet, sach thieu, cai thien
thien thuc » thien phuc, hien thuc, trien thuc
lich khong » tinh khong, lich cong, lich tong
hoc thong » hoc thuong, hoc trong, hoc hong
sach tien » sach tren, sach thieu
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
khoa hoc » hoa hoc
tien thi » trien thi, tiep thi, tien khi
thi lich » thai lich, thi bich, thi linh
khong he » khong khi, hong ha, khong _
su cach » tu cach, su cac, cuu cach
su sach » so sach, vu sach