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.
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.