Perhaps you should try some spelling variations:
patients 10.3.2 » patients 15.3.2, patients 10.12, patients 12.3.1
patients 10.6 » patients 10.1, patients 10.5, patients 11.6
among farmers » salmon farmers
lang yan » wang yan, wang yang, zhang yan
yan yang » yang yang, yao yang, dan yang
yang jan » yang fan, yang jin, yang jun
jan de » van de, aan de

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yang jan de ((patients 10.6) or (patients 10.3.2)) among farmers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan yang jan de ((patients 10.6) OR (patients 10.3.2)) among farmers ;*.