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khat khoa » khuan khoa, pham khoa, vat khoa
tinh khat » tinh chat, tinh khac, trinh chat
khoa hoc » hoa hoc
thu dac » thu duc, thu xac, thu da
tu dac » tu cac, tu dat, tu dau
khat khoa » khuan khoa, pham khoa, vat khoa
tinh khat » tinh chat, tinh khac, trinh chat
khoa hoc » hoa hoc
thu dac » thu duc, thu xac, thu da
tu dac » tu cac, tu dat, tu dau
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