Yak 130
The Yak-130 is a jet trainer, and can also perform the duties of a real fighter in air combat, reconnaissance and light attack. Yak-130 is capable of carrying a combat load of up to 3 tons, ideal for battlefields in mountainous and wooded areas in Vietnam. Can "operate" even from field airfields (not paved with hard surfaces), carry out missile and bomb attacks on ground targets, destroy air targets at high speed Low: UAV, transport aircraft or helicopter.
Yak-130 also has good combat features when it carries radar guidance and modern air-to-air and air-to-ground missiles, it is fully capable of fighting with Su-27/30 when standing in the same team. model, so it would not be surprising if each Su-27/30 regiment was staffed with 1-2 more Yak-130s.