To find individual journal articles, you will primarily use electronic indexes/databases to do your searching. With such indexes/databases, you can find either article abstracts or full-text articles by conducting an author, title, keyword(s), or subject searching.
If there is no full-text article available online, you will need to check if the library has the actual journal (physical item) so that you can locate it and read the article. You can find the holding and location information of the journal by typing its title in the search box on the MSU online catalog. If the library does not have subscription to the journal, you can request for a copy of the article through inter-library loan service (https://illiad.library.msstate.edu/illiad/).