You will be searching in library databases to find scholarly journals related to the question you've asked. Try not to search for vague or very general phrases such as "student success."
A research journal article is going to use something specific to measure what we consider "student success." Are you looking for success based on standardized test scores, graduation, program completion, persistence, self esteem, employment opportunities? Try to narrow down to these more specific aspects of success.
The terms you use when searching make all the difference in the sources that you find. If you are not finding good sources with the terms you are using, don't give up! You need to think about other terms that could be used to describe your topic and search for those instead.
Since Primo Library Search includes articles in its results, you may be wondering why you would bother to search in a journal article database. There are several reasons for using an individual database: