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cach hoc » cach thuc, cach thoi, dich hoc
tan khoa » toan khoa, tran khoa, san khoa
khoa hoc » hoa hoc
dan nhan » danh nhan, dan chan, van nhan
nhan van » nhan dan, nhan va, phan van
ve cach » va cach, ve cac, ve canh
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc tan » hoc tang, hoc dan, hoc tai
hoi dan » hoa dan, hoc dan, hoi dap
hoc xa » hoc ma
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