Your literature search methods should be transparent and reproducible. Reproducibility of your search strategy promotes best practice.
Tools like Notepad, Google Docs, Microsoft Word, Microsoft Excel can help you keep a detailed record of each database search strategy. See example below:
Reporting the search methods
Reporting your search methods helps users to evaluate the validity of your project.
Atkinson, K. M., Koenka, A. C., Sanchez, C. E., Moshontz, H., & Cooper, H. (2015). Reporting standards for literature searches and report inclusion criteria: making research syntheses more transparent and easy to replicate. Research synthesis methods, 6(1), 87-95.
Note: There are reporting standards and guidelines for study types (i.e. randomized control trial, case study, observational study, systematic reviews)
PRISMA flow diagram
The diagram is part of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) Statement, a reporting standard for systematic reviews.
PRISMA flow diagram template is an example of how to report your search results.