Perhaps you should try some spelling variations:
les patients » des patients, older patients, aids patients
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
yang can » yang fan, yang dean, yang yang
bu among » eu among
can les » can let, can lead, can best
1 among » 1.5 among, 1.8 among, eu among

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 liang yang can les patients ((((1 among) OR (bu among))) OR (19 among)) letters ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang yang can les patients ((((1 among) OR (bu among))) or (19 among)) letters ;~".
• Adding a wildcard symbol may retrieve word variants: wang liang yang can les patients ((((1 among) OR (bu among))) or (19 among)) letters ;*.