Nasullaeva Dilnoza is a specialist in the Korean language, focusing on the theory and practice of teaching Korean as a specialized language. She conducts classes on Korean culture and prepares students for the Korean language proficiency exam. She studies the semantics of onomatopoeic words in the Korean language and has published several scientific articles on this topic.

Dilnoza Nasullaeva completed a professional development course at Hallim University (Korea) and, with the support of the Korean Embassy and the International Cooperation Agency, attended advanced training courses at Kyonggi University, participating in lectures by professors from South Korea.