How do you search for related articles?
For physics, google scholar and Inspire prove to be the best option(Inspire also list the "cited by" section, where you can see where an idea in a paper was applied/extended, and is very useful from this point of view, since for most journals this section require a subscription). These two also includes new papers which in high energy physics appear first on arxiv. However, for other sciences, different search engines are expected.