Perhaps you should try some spelling variations:
de patients » des patients, do patients, de pacientes
yang yang » wang yang, wang yan
1.8 among » 19 among
1.5 among » 2.15 among, 19 among
yang van » yang fan, yang dean, trang van
1 among » 19 among, bu among, eu among
van de » van der, van den
wang » 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 OR wing) yang yang van de patients ((((1.8 among) OR (1 among))) OR (1.5 among)) masters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or wing) yang yang van de patients ((((1.8 among) OR (1 among))) or (1.5 among)) masters ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or wing) yang yang van de patients ((((1.8 among) OR (1 among))) or (1.5 among)) masters ;*.