Perhaps you should try some spelling variations:
salmon farmers » salmon farms, among farmers
patients 14.12 » patients 10.12, patients 10.1, patients 14.3
patients 14.1 » patients 10.1, patients 14.3, patients 14.5
gang yang » wang yang, huang yang, wang yan
yang yang » wang yang, wang yan
yang plan » yang dean, yang fan, yang lin
plan des » plan de, bilan des, plan du

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: gang yang yang plan des ((patients 14.1) OR (patients 14.12)) salmon farmers ;~.
• Adding a wildcard symbol may retrieve word variants: gang yang yang plan des ((patients 14.1) or (patients 14.12)) salmon farmers ;*.