Perhaps you should try some spelling variations:
patients 10.5 » patients 10.1, patients 10.6, patients 14.5
among masters » among partners, among farmers, among actors
patients 1.8 » patients 10.1, patients 10.6, patients 11.6
yan yang » yang yang, yao yang, dan yang
wai yan » wang yan, wei yang
fan de » aan de, jan de, can de
van de » van der, van den

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: wai yan yang ((fan de) OR (van de)) ((patients 1.8) OR (patients 10.5)) among masters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wai yan yang ((fan de) or (van de)) ((patients 1.8) OR (patients 10.5)) among masters ;~".
• Adding a wildcard symbol may retrieve word variants: wai yan yang ((fan de) or (van de)) ((patients 1.8) OR (patients 10.5)) among masters ;*.