Perhaps you should try some spelling variations:
patients risk » patient risk, patients links, patients si
cost patients » cost patient, cleft patients, care patients
wang liang » wang yang
risk along » risk among, ask along
along hui » along nhue, tong hui, gong hui
yang jui » yang judy, yang di, yang xi

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 jui) or (pang jun)) cost patients risk along hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ((yang jui) OR (pang jun)) cost patients risk along hui ;.
• Adding a wildcard symbol may retrieve word variants: wang liang ((yang jui) or (pang jun)) cost patients risk along hui ;*.