Perhaps you should try some spelling variations:
among masters » among partners, among farmers, among letters
among actors » among doctors, among acholi, among donors
patients 1 » patients _
yan yang » yang yang, yao yang, dan yang
van den » van der, van de
jan de » van de, aan de
wang » wing, wan, lang

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: wang yan yang ((jan de) OR (van den)) patients 1 ((among masters) OR (among actors)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yang ((jan de) or (van den)) patients 1 ((among masters) OR (among actors)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yan yang ((jan de) or (van den)) patients 1 ((among masters) OR (among actors)) ;*.