Perhaps you should try some spelling variations:
patients 10.6 » patients 10.1, patients 10.5, patients 11.6
among masters » among partners, among farmers, among actors
patients 1.8 » patients 10.1, patients 10.5, patients 11.6
yan yang » yang yang, yao yang, tan yang
dan yang » daun yang, tan yang, wang yang
aan de » van de, jan de

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) OR (dan yang)) aan de ((patients 1.8) OR (patients 10.6)) among masters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wai ((yan yang) or (dan yang)) aan de ((patients 1.8) OR (patients 10.6)) among masters ;~".
• Adding a wildcard symbol may retrieve word variants: wai ((yan yang) or (dan yang)) aan de ((patients 1.8) OR (patients 10.6)) among masters ;*.