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khau thong » khau thuong, khap thong, khau tong
sach tham » sach nha
cac khoa » cac khoan, cac khoi, dac khoa
tham hoc » thai hoc, tham hoa, than hoc
hoa khau » khoa kham, hoa khanh, khoa phau
te sach » toc sach
tri cuu » tra cuu, trinh cuu, troi cua
khoa he » hoa he, khoa hoc, khong he
hoc cac » hoc cao
cac hoa » cac hoat, cau hoa, cac hop
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