Perhaps you should try some spelling variations:
among masters » among partners, among farmers, among actors
patients 1.8 » patients 10.1, patients 10.5, patients 10.6
1.8 among » 1.5 among, 19 among, 1 among
yan yang » yang yang, dan yang, tan yang
yao yang » yang 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: lang ((yan yang) OR (yao yang)) ((fan de) OR (van de)) patients 1.8 among masters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((yan yang) OR (yao yang)) ((fan de) or (van de)) patients 1.8 among masters ;~".
• Adding a wildcard symbol may retrieve word variants: lang ((yan yang) OR (yao yang)) ((fan de) or (van de)) patients 1.8 among masters ;*.