Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
cost patients » cost patient, care patients, des patients
hua guang » hua jiang, wu guang
guang end » guang eu
risk cong » risk coping, risk among, risk along
lang hua » wang hua, wang hui, dong hua

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: "lang hua guang end ((cost patients) OR (cleft patients)) risk cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: lang hua guang end ((cost patients) OR (cleft patients)) risk cong shu ;*.