Perhaps you should try some spelling variations:
de paciente » de pacientes, del paciente, de parente
yang yang » wang yang, wang yan
1.8 among » 1.5 among, 19 among
yan yang » yao yang, dan yang, tan yang
1 among » 19 among, 1.5 among, bu among
aan de » van de, jan 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) OR (yang yang)) aan de paciente ((1.8 among) OR (1 among)) partners ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) or (yang yang)) aan de paciente ((1.8 among) OR (1 among)) partners ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) or (yang yang)) aan de paciente ((1.8 among) OR (1 among)) partners ;*.