Perhaps you should try some spelling variations:
cross patient » class patient, proms patient, access patient
les patients » des patients, older patients, aids patients
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
wrong who » wrong why, wrong what, wrong when
along who » along two
yang dem » yang dean, yang di, yang d

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