Perhaps you should try some spelling variations:
among partners » paying partners, among farmers, among parents
pacientes 10.1 » pacientes 3.1, patients 10.1, paciente 2.1
10.1 among » 1.5 among, 1.8 among
yang yang » wang yang, wang yan
yan yang » yao yang, dan yang, yan wang
tan yang » dan yang, tan ying, tan yong
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 (tan yang))) OR (yang yang)) van de pacientes 10.1 among partners ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((((yan yang) OR (tan yang))) or (yang yang)) van de pacientes 10.1 among partners ;~".
• Adding a wildcard symbol may retrieve word variants: lang ((((yan yang) OR (tan yang))) or (yang yang)) van de pacientes 10.1 among partners ;*.