Entity Framework Code First : How to fix error with seft reference foreign key in SQL using Annotations

I have trouble with the database, I use the table t_CTDaotao sc_HeNganh table, the problem here is that the self-referencing keys t_CTDaotao1 can only refer to sc_HeNganh1, and the keys t_CTDaotao2 cannot reference sc_HeNganh2, more correctly it only Reference is 1 key, not multiple keys

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