When writing up your systematic review keep in mind the specific guidelines for structuring your review. Systematic review standards are elements that should be reported in any published systematic review. Also there may be other 'Instructions to Authors' provided by the journals or organisations in which you plan to publish.
The PRISMA statement can be followed to ensure reliable coverage of the systematic review methods, results and conclusions. The PRISMA Elaboration and Explanation (E&E) document that accompanies the PRISMA statement provides instructions for each of the items on the checklist.
This link is to best practice examples from Cochrane on how to write about your searches in a Cochrane review.
You can adapt examples to suit your systematic review.