Of course. There is no clear stipulation that two or more papers are not allowed to be published within one year. As long as the author has a reasonable time schedule, he can submit the topic of the paper on time. It doesn't matter to publish many papers a year, so it is ok to publish three papers a year. Thesis is a common term in classical literature, which means to talk or exchange ideas. Nowadays, papers are often used to refer to articles that conduct research in various academic fields and describe academic research results, which are referred to as papers for short.