Chalida Kallayanasute (2011) studies "A study of vocabulary leaning strategies used by graduate students at Thammasat University." This study aim to (1) study vocabulary learning strategies commonly used by first-year graduate students of Master of Arts in English for Careers and (2) investigate vocabulary learning strategies that assist fint-year graduate student of Master of Arts in English for Careers to enhance vocabulary acquisition. The findings of the study revealed that the majority of respondents were 20-30 years old and have studied the English language for more than 16 years. The use of vocabulary learning strategies was divided into five strategies: determination strategies, social strategics, memory strategies, cognitive strategies, and metacognitive strategies.Regarding determination strategies, a monolingual dictionary was most often used by most respondents. In terms of social strategies, asking classmates for a word meaning or definition was most often used. Connecting the word with the background knowledge was most often used as a memory strategy. Most respondents metacognitive strategies, the results showed that speaking with foreign friends or foreigners were the other vocabularies learning strategies, apart from the five vocabulary learning strategies, used to acquire English vocabulary.