After returning from his loan spell, Terziev made his Botev debut on 3 July 2014, in a 4–0 win over Libertas in the first leg of the first qualifying round of the UEFA Europa League.

Terziev made his A Group debut in a 1–0 home win against Lokomotiv Sofia on 20 July, appearing as a 69th-minute substitute for Milen Gamakov.

On 22 October 2016, Terziev scored a goal after an assistance from Todor Nedelev during the 2–3 home defeat from Cherno More Varna.

[19] In late January 2015, Terziev received his first call-up to the full national side by new manager Ivaylo Petev for a friendly match against Romania but he remained an unused substitute in this game.

[20] He was also part of Petar Houbchev's preliminary list for a November 2016 World Cup qualifier against Belarus, but did not make the final squad for the match.