Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
cost patient » cross patient, courts patient, class patient
wang liang » wang yang
liang yang » liang ying, wang yang, yang yang
among who » along who, among hr, wrong who
yang can » yang fan, yang dean, yang yang

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 can ((cost patient) or (cleft patients)) risk among who ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang yang can ((cost patient) OR (cleft patients)) risk among who ;*.