Sometimes it's helpful to search using the Medical Subject Heading terms - these are words that are standardized across the medical discipline so researchers (including you) have an easier time finding all the relevant information they need. Nursing and Allied Health makes it easy to incorporate these terms into your search, or limit your results to include only the terms you want.
In the middle of the page, there's a Search box labeled "MeSH Subject". You can either:
To add these terms to your search string back in the database, click the checkboxes next to the terms you'd like to include. Then choose whether you'd like to combine them with OR, AND, or NOT, and then click "Add to Search".
You'll be brought back to the Advanced Search screen, with your terms added into the search box
You can also choose to search as normal and then limit your results to only items with certain MeSH terms.
On the left side of the page with your other limiters, scroll to "Mesh", then select the term you'd like to include.
If you want to include more than one term, click on the "More Options..." link, and then select the checkboxes next to each term you'd like to include (or exclude).