When searching in a scholarly journal, you won't necessarily find reviews, but rather criticisms, interpretations, and analysis of films, genres, themes, etc. These are written by scholars in the field and are different than a review that you might find in a newspaper or website (which are more about recommendations to viewers).
Here are some search strategies when you are searching within a scholarly journal or a larger database (which houses many journals):
Each of the links below will take you to the library record for the journal listed. You can search within the journal by typing in your terms into the box that says "Search within Publication" in light grey text. This box should be the first item underneath the journals' title.
These are suggested databases that you can use to search for scholarly and/or peer-reviewed articles. Databases are large collections of journals and so you'll get results from many different journals. You will need to narrow your results on the left of the screen - these are called "limiters."