Perhaps you should try some spelling variations:
salmon farmers » salmon farms, among farmers
patients 10.12 » patients 10.1, patients 14.12, patients 10.3.2
patients 14.6 » patients 10.6, patients 11.6, patients 14.1
gang yang » wang yang, huang yang, wang yan
yang yang » wang yang, wang yan
yang plan » yang dean, yang fan, yang lin
plan du » plan de, plan fur

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: gang yang yang plan du ((patients 14.6) or (patients 10.12)) salmon farmers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: gang yang yang plan du ((patients 14.6) OR (patients 10.12)) salmon farmers ;*.