Debrecen won the Hungarian Cup in the 2007–08 season by beating Budapest Honvéd in the final 9–1 on aggregate.

In the first round of the Central-East region they drew in Kazakhstan against Shakhter Karagandy 1–1, while in the second leg they beat the Kazakh team by 1–0.

After beating Kalmar FF, Levadia Tallinn, and Levski Sofia Debrecen reached the group stages of the 2009–10 UEFA Champions League season.

On 1 May 2012, Varga won the Hungarian Cup with Debrecen by beating MTK Budapest on penalty shoot-out in the 2011–12 season.

He was assigned the number 8 shirt previously worn by Newcastle United loanee Sammy Ameobi last season.

[5] He made his debut for the English side in the opening match of the 2013–14 Championship season against Leicester City during an eventual 1-2 home loss.

However Hungary lost to 3–0 at the Estádio da Luz in Lisbon Varga's performance was convincing, therefore he became a stable member of the national team during the coaching of the Dutch Erwin Koeman.