Perhaps you should try some spelling variations:
class patient » cross patient, access patient, class latin
patient risk » patients risk, patient task, patient cost
liang yang » wang yang, yang yang, huang yang
liang ying » liang liying, huang ying, zhang ying
risk along » risk among, ask along
can class » care class, case class, can cash
along shu » along nhue, cong shu, along who

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((liang yang) or (liang ying)) can class patient risk along shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((liang yang) OR (liang ying)) can class patient risk along shu ;.
• Adding a wildcard symbol may retrieve word variants: wang ((liang yang) or (liang ying)) can class patient risk along shu ;*.