The library subscribes to some Springer journals, but by no means all. In this case, you identified an article in a Springer journal for which we have no access:
Matthew G. Seetin & David H. Mathews. RNA Structure Prediction: An Overview of Methods. Methods in Molecular Biology Volume 905 (2012): Pages 99-122.
DOI 10.1007/978-1-61779-949-5_8
You may submit an Interlibrary Loan request to obtain a copy of the article. If you have not used Interlibrary Loan before, you will be prompted to create an Interlibrary Loan account before entering the publication information which I supplied above. The DOI is the Digital Object Identifier unique to the article. I would include it in the Notes box of the form.
Interlibrary Loan can usually obtain a PDF copy of an article in 2-4 days.
You may search the title of a journal in the All eJournals A-Z directory linked from the Research Tools column of the library homepage to confirm if the library subscribes and the time period available.
Science Direct is the journal portal of the publisher Elsevier. Just as with Springer, the library subscribes to some Elsevier journals but not all. It's easier to sort through this by searching for a specific journal than in searching in the publisher's full database.