Perhaps you should try some spelling variations:
cleft patients » select patients, les patients, benefit patients
patients li » patients si, patients _, patients 1
wang yang » wang yan, wang yanling
yang july » yang judy, yang jui, yang jun
song shu » cong shu, song shin, tong shui
yang xi » yang di, yang yi, yang jui
li song » li cong, li rong, kim song

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (wang liang)) ((yang xi) or (yang july)) cleft patients li song shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (wang liang)) ((yang xi) OR (yang july)) cleft patients li song shu ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang liang)) ((yang xi) or (yang july)) cleft patients li song shu ;*.