Missing Important Words During Salah
It was an unintentional mistake and had you realized it sooner during your Salah, you could compensate it with rectification ( if possible ) and with a Sajda-e-Sehaw at the end. Since that moment has passed away and it would be undue hardship to makeup for all your previous Salah as undue hardship is not required in Islam, now you can adopt this approach moving forward with your upcoming Salah. Please see for details on Sajda-e-Sehav : Discussion 62524 • Reply 62554