* (Asterisk) finds all forms of a word: for example,
Zoroast* for Zoroaster, Zoroastrianism, Zoroastrian, and Zoroastrians
eschatolog* for eschatological, eschatologist, eschatologists, and eschatology.
★ Phrase Searches
Enclosing a phrase in double quotation marks, which allows you to search a database for particular words in a particular order: for example, "Ahura Mazda"
You may find these sources help you identify the type of material you have found in your research.