With your keywords, try using different combinations in search engines like OneSearch and Google Scholar.
In OneSearch, put separate concepts in their own search bar, which are connected by "and". Then connect related keywords with the word "or" as shown below:
And you'll find great journal articles like these:
Once you find a few good articles, look at their Bibliography or Reference lists to find related research, like this reference list from the article "Types of On-Screen Content and Mental Health in Kindergarten Children"
