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tuyet hang » tuyet nhung, quyet thang, thuyet hung
tai tieng » thi tieng, tap tieng, ta tieng
pho thong » he thong
bai tuyet » bai thuyet, ba tuyet, ban tuyet
hang khoa » dung khoa
hoc trong » hoc thuong, hoc tieng, dot trong
sach tai » sach bai, sach tham, sach dao
anh khoa » doanh khoa
khoa pho » khoa phu, khoa khoa, khoa phau
cach bai » cac bai, sach bai, cach bao
khoa hoc » hoa hoc
su sach » so sach, vu sach
tu cach » tu cac