Main options you may use to access a wider collection of materials:
Duxiu Academic Search, also known as Medalink, is a massive knowledge database containing 900 million pages of full-text information of 1.7 million books (mainly in Chinese). It supports searching on books, journals, newspapers, conference papers, and dissertations in all subjects.
The database allows multi-angle search function for users to get desired academic information in the shortest time. After users submitting their request by email, the system will deliver the text to users’ mailbox. Each text has a 20-day validity period, during which the users can access it at any time.
The Duxiu auto-reply email could be mistaken as a spam. Please check whether it has been filtered.
Access link: http://www.duxiu.com/