it’s too bad that, it’s unfortunate that, I’m sorry that ☊ like: rất tiếc là → →
Die Lieferung war leider unvollständig. ☊ 
Kiện hàng rất tiếc là không đầy đủ. ☊ (Lektion 125, Nr. 2480) Leider haben Sie auf unsere 1. Mahnung nicht reagiert. ☊ Rất tiếc là ông / bà / quý vị đã không phản hồi lá thư nhắc nhở đầu tiên của chúng tôi. ☊ (Lektion 126, Nr. 2539) I was sorry not to have seen them. ☊ not ☊
a pity (that...): It's a pity that you can't stay longer. ☊ pity ☊
regret that...: I regret that I never got to meet him in person. ☊ regret ☊
regret that...: I regret that I am unable to accept your kind invitation. ☊ regret ☊
it is regretted that...: It is to be regretted that so many young people leave school without qualifications. ☊ regret ☊