Catalog Search: Search bibliographic fields such as Title, Author, Publication Date.
Full-text Search: Use keywords to search all the words in all the works in HathiTrust.
Collection Builder: Search inside a collection of materials that you or others have created.
Single-volume Search: When viewing a work in the page-viewing application, use keywords to search inside that volume alone.
Phrase Searching: Use quotes to search for an exact phrase: e.g., "occult fiction".
Wildcards: Use * or ? to search for alternate forms of a word. Use * to stand for several characters, and ? for a single character: e.g., optim* will find optimal, optimize or optimum;wom?n will find woman and women.
Boolean Searching: Use AND and OR (capitalized) between words to combine them with Boolean logic: e.g., (heart OR cardiac) AND surgery will find works about heart surgery or cardiac surgery