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nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thanh van » thanh san, thanh toan, thanh phan
cach hoc » cach thuc, cach thoi, dich hoc
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
cac khoi » cac thoi, cac khoan, cach thoi
va thanh » gia thanh, ban thanh, va tinh
te cach » ve cach, te sach, tu cach
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