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
yang yang » wang yang, wang yan
1.8 among » 1.5 among, 19 among, 1 among
yan yang » yao yang, dan yang, tan yang
aan de » jan 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: wan ((yan yang) OR (yang yang)) ((aan de) OR (van de)) patients 1.8 among masters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan ((yan yang) OR (yang yang)) ((aan de) or (van de)) patients 1.8 among masters ;~".
• Adding a wildcard symbol may retrieve word variants: wan ((yan yang) OR (yang yang)) ((aan de) or (van de)) patients 1.8 among masters ;*.