The search strategy will be reported on in the methods section of your paper. Therefore, it is crucial to have a well thought out and documented search strategy.
Cochrane Collection Plus is a comprehensive collection medical research and practice of databases from the Cochrane Library, including the Cochrane Database of Systematic Reviews, Clinical Answers, Central Register of Controlled Trials, and Methodology Register.
Systematic reviews should be replicable. You will need to document the search process for each database, including all search terms & variations, how many results you retrieved for each search, how many records were duplicates, & the final number of results that you used for your first pass. PRISMA provides guidelines on the information you will need to include.