Many scholarly databases offer an Advanced search option, with search functionalities that can be very useful when you are searching for literature to include in a literature review.
An advanced search often allows you to:
Some databases offer the advanced search as a command line search: you have to enter the field codes, operators etc. yourself. This may sound like a lot of work, but it also allows you to prepare a search query in Word or Excel and copy/paste the query in the database's search interface. This is especially handy when you want to use the same search terms in multiple databases.
The video tutorial Using the Advanced Seach Query Builder in Web of Science (1:43) gives an overview of the advanced search options in one particular database: Web of Science.
In the handout Using the advanced search - an example (PDF) you can see an example of a search query using the Advanced search interface in Scopus, Sociological Abstracts (via ProQuest) and PsycINFO (via Ovid).