Perhaps you should try some spelling variations:
les patients » des patients, older patients, aids patients
cost patient » cross patient, courts patient, class patient
wang liang » wang yang
wang wang » wang yang, wang yan, wang yong
liang dem » liang dan, liang wei
wrong who » wrong why, wrong what, wrong when
along two » among two, along who

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 wang liang dem ((cost patient) OR (les patients)) risk ((wrong who) OR (along two)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang wang liang dem ((cost patient) or (les patients)) risk ((wrong who) or (along two)) ;*.