Databases frequently provide full-text for many articles but in some cases the full text is not available.
In order to get an article that is not available online in full text you can request the article by submitting an Interlibrary Loan Article Request Form.
A link to this form can be found on the library website in the right-hand column under Popular Pages.
These databases cover many disciplines.
Web of Science can be challenging to use. Save time. Check out this brief tutorial on doing an advanced search in Web of Science.