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khoa thong » hoa thong, thoai thong, pho thong
thuc dung » thuoc dung, thuy dung, tuc dung
dung khoa » dung cho
sach tri » sach tai, sach tren, sach truc
tri thuc » tri tue
tu thuoc » truc thuoc, tu thuong, cua thuoc
su sach » so sach, vu sach
khoa he » hoa he, khoa hoc, khong he
sach da » sach dao, sach dat, sach dau
tu cau » tu cac, cu cau, tu can
cau tu » dau tu, cau truc
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