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Authors
Toan, Duong Thi
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Article History
Received: 28 July 2022
Accepted: 15 February 2023
First Online: 3 March 2023
Declarations
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: This paper is the result of my research and does not violate any ethical or copyright issues.
: This paper is my own research, had received some advice from Professors at Ibaraki University and the University of Science, VNU, Hanoi. However, all professors encourage me to write my own paper. Thus, the author of the paper is only one as Duong Thi Toan.
: Yes, the author will follow the submission process and try the best to improve the paper for publication.
: The authors declare no competing interests.
