Perhaps you should try some spelling variations:
among partners » paying partners, among farmers, among parents
patients 1.8 » patients 10.1, patients 10.5, patients 10.6
de patients » des patients, do patients, de pacientes
yang yang » wang yang
1.8 among » 1.5 among, 19 among, 1 among
yang fan » zhang fan, yang dean, yang jin
wai yan » wei yang

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