Reviews for recent films may be found in general databases such as SuperSearch and Canadian Newsstand.
For older fllms:
Quickly find reviews by putting the film title in quotations (e.g. "Django Unchained") and by limiting the results to reviews.
Tip: the film's title is not always included in the indexing of a film review AND film reviews are not always classed as reviews in the format type.
If you cannot find a review for your film, try expanding your search by looking in the time range of the film's release, but searching with the director's name.