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dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
dan khoa » dang khoa, da khoa, san khoa
khoa hoc » hoa hoc
tu dich » te dich, chu dich, hut dich
phat va » chat va, pham va, phat vi
phap va » phap vat, pham va, pham van
hoc xa » hoc ma
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