It is crucial to investigate the improvement of vocabulary which is the base of spoken and written communication. This research was aimed at investigating which strategies are used to improve vocabulary fluency, and importance of reciting unfamiliar words through English songs.  A combination of both quantitative and qualitative research designs was developed for two treatments and two control groups consisting of 134 first-year undergraduates from Mandakh University in Ulaanbaatar Mongolia. After collecting the data from the questionnaire with a total of 15 questions and the notes with 5 questions, we worked on analysis and discussion parts based on previous studies on vocabulary learning. Findings of the quantitative outcomes represented that memorization achievements of two treatment groups increased by 17.7%, while the final result of the two control groups raised by 21.3% compared to measurements of inbound tests. The qualitative research outcomes revealed that the most commonly used strategies are reciting unfamiliar words with translation (42.5%), and listening to songs with lyrics (37.6%) dominated by the majority of students.