Perhaps you should try some spelling variations:
among actors » among doctors, among acholi, among donors
patients 1.8 » patients 10.1, patients 10.5, patients 10.6
de patients » des patients, do patients, de pacientes
daun yang » du yang, tan yang, un yang
1.8 among » 1.5 among, 19 among, 1 among
yan yang » yang yang, yao yang, tan yang
dan yang » tan yang, wang yang, yang yang
fan de » van de, aan 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) OR (daun yang)))) fan de patients 1.8 among actors ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wai ((yan yang) or (((dan yang) OR (daun yang)))) fan de patients 1.8 among actors ;~".
• Adding a wildcard symbol may retrieve word variants: wai ((yan yang) or (((dan yang) OR (daun yang)))) fan de patients 1.8 among actors ;*.