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minh hoc » sinh hoc, hinh hoc, tinh hoc
cuu dong » cuu cong, cuu long, luu dong
dong hoc » dong co, dong luc
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
vu minh » vu dinh, van minh
hoc xa » hoc ma
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han va » hang va, hanh va, nhan va
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