A great place to start is with Ebsco.
Click [Choose Databases] to add the following additional databases:
I recommed you add the following databases to your search: Biomedical Reference Collection, CINAHL Plus with Full Text, Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, Cochrane Methodology Register, Health Technology Assessments, International Pharmaceutical Abstracts, Nursing & Allied Health Collection
You might like this tool:
Lack of search success seems to go wrong in two opposite directions --- many results but not focused on the topic or not many at all.
Click on the title then look for the database that has your date range.