Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
cost patient » cross patient, courts patient, class patient
wang yang » wang yan, wang liang, wang yanling
risk cong » risk coping, risk among, risk along
yang jin » yang jie, yang jun, ying jin
yang up » yang jui, tying up, yang jun

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ((yang up) OR (yang jin)) ((cleft patients) OR (cost patient)) risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang ((yang up) OR (yang jin)) ((cleft patients) OR (cost patient)) risk cong shu ;*.