Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
lost patients » les patients, cost patient, des patients
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 ((lost patients) OR (cleft patients)) risk among who ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang yang can ((lost patients) OR (cleft patients)) risk among who ;*".