You can get research help any time, day or night. Right now (during the pandemic lock down) it's through a chat service. You can find links for "Ask a Librarian" on the Library Home Page, or use:
Truncation:
Find the root word with any ending:
To find rehabilitation or rehabilitate or rehabilitating or rehabilitated, search the root of the word followed by the truncation symbol: Example: rehabilitat*
Boolean:
Note: When you use "or" it is wise to force the set - put parentheses around the terms you want grouped.
Example: arthritis and "physical therapy" and ("motor function" or movement)
Pearl Searching:
If you find an article that is exactly on topic, look at its indexing (subject headings or descriptors). Find the ones that apply to your topic and use those in a subject field search to find everything in the database that is focused on that topic.