Is there a way to find review articles by the keyword?
To me, using academic citation databases (such as Scopus or Web of Knowledge) is the obvious choice for these types of searches, since they have option for filtering on article type (which Google Scholar doesn't have). You haven't explained why you "... feel some limitations.." when using ScienceDirect, so it is hard to know exactly what you feel is lacking. If your issue is that it is a closed subscription platform, you can also use PubMed, which can also filter search results on article type (as review[Publication Type] in advanced search or by clicking on "Review" in the left panel when viewing search results). The main issue with PubMed is that it has a smaller coverage than the other databases, at least in some fields of science.