How to use Medline via OVID
Using AND

This search produces Set #2, with 3242 records containing the subject headings brain damage, chronic and brain injuries with all their subheadings. Now you need to combine the two searches.

You can combine your searches using AND and the number of the previous search sets (in the left hand column of the search results table).

Type in 1 and 2, then press ENTER. Set #3 is the result, which contains 62 records. Remember, this number will vary if you try this search yourself, as the database will have been updated.

You now have created a set of records that each contain a reference to both of the concepts in your question.