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khoa khong » khoi khong, hoa khong, khon khong
binh khong » benh khong, tinh khong, sinh khong
bach khoa » anh khoa
khoa khoa » hoa khoa, khuan khoa, khoa hoc
sach tri » sach tai, sach tren, sach truc
sach thi » sach thu, sach tai, sach thieu
thi binh » thai binh, thi bich, thi minh
khong he » khong khi, hong ha, khong _
so sach » so sanh, bo sach, co sach
tu sach » thu sach, su sach, te sach
thi thi » thi thai, thi thin, thi thu
tri vu » tri va, thi vu, tri du
thong » trong