Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
wing yanling » wang yangming
patients si » patients _, patients 1, patients en
tong shui » tong hui, cong shu, gong hui
yang up » yang jui, tying up, yang jun
yang xi » yang di, yang yi, yang jui
si tong » hui tong, xin tong

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wing yanling) OR (wang yanling)) ((yang up) OR (yang xi)) cleft patients si tong shui ;~.
• Adding a wildcard symbol may retrieve word variants: ((wing yanling) or (wang yanling)) ((yang up) or (yang xi)) cleft patients si tong shui ;*.