When performing research in religious studies, there are often many variant spellings for the same term (especially in Asian religions, such as Lao-Tzu vs. Lao-Tze vs. Laotse vs. Laotze vs. Laozi). Thus, it can be helpful to try out multiple spellings if you are having trouble finding information.
Can't find the book or article you want? Try Interlibrary Loan (ILL)! We also have an ILL FAQ for more info!
Often, you can find primary sources through the reference list of a secondary source. You can usually spot a primary source fro how the author is referring to it, and often they'll be translated from their original language so translators will probably be named in the reference. For help with this, refer to the tutorials in the How-To tab above, "Know the Difference Between Primary and Secondary Sources" and "Use Reference Lists to Find More Sources" specifically.
If you search for the title of your primary source in the search box on the Library homepage (or in the lefthand column here), you may find that we have a copy. You can also find lots of good primary sources online. You can usually google the title (which you probably know from a reference list or from your other research) and come up with some text. Many of these ancient and/or religious texts are freely available because they're too old for copyright.