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phai thuong » pham thuong, phi thuong, hai thuong
phan thuong » hang thuong, phan xuong
khoan phai » khong phai, khoa phau, khoan hoi
bac khoan » cac khoan, bach khoa, coc khoan
thieu hoc » hieu hoc, tieu hoc, thieu so
hoc hoach » hoc hoa, hoc sach, hoc hanh
hoach hoa » hoach ha, hoach hoi, hoach toan
sach tai » sach bai, sach tham, sach dao
hoa phan » hoa dan, co phan
su sach » so sach, vu sach
tai hoc » thai hoc, dai hoc, bai hoc
hoc bac » hoc bai, hoc cac, hoc mac