Trying to find only research articles (or review essays) is an interesting puzzle.
As others have mentioned, checking with an academic librarian for a curated list, and conducting boolean searches, are great starting points.
Some journals publish literature reviews (we don't, specifically, though we do publish evidence summaries of specific research articles).
However, there are some really cool tool you can use to improve the chances of finding things!
ResearchRabbit and Connected Papers allow you to find work that is connected, in some way, to a work that you specify - could be same author, same field, cited by, etc.
2Dsearch can be helpful, especially for anyone not used to boolean searching.