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khoan phai » khong phai, khoa phau, khoan hoi
khoa thong » hoa thong, thoai thong, pho thong
phai thong » phap thong, phai tuong, phan thong
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa khoa » hoa khoa, khuan khoa, khoa hoc
sach tai » sach bai, sach tham, sach dao
tai thuc » thai thuc, tri thuc, dai thuc
doi thuc » do thuc, doi thu, doc thuc
thuc cac » thuc cach, tuc cac, phuc cac
su sach » so sach, vu sach
cac doi » cac dai, cac toi, cau doi