hợp đồng sự ký hợp đồng ký kết 
contract like: ký kết → →
der Heiratsantrag ☊ 
giấy đăng ký kết hôn ☊ 
☊ The agreement (= the document recording the agreement) was signed during a meeting at the UN. ☊ agreement ☊
contract with sb: to enter into/make/sign a contract with the supplier ☊ contract ☊
Invoices are signed on a daily basis. ☊ daily ☊
to make/sign/conclude/close a deal (with sb) ☊ deal ☊
Due to the fact that they did not read English, the prisoners were unaware of what they were signing. ☊ fact ☊