Perhaps you should try some spelling variations:
lead patients » cleft patients, des patients, bat patients
les patients » des patients, older patients, aids patients
among peers » among ers, among users, among letters
liang yang » liang ying, yang yang, huang yang
wang yang » wang yan, wang liang, wang yanling
si among » ngi among, sex among, 19 among

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) or (wang yang)) dean ((lead patients) OR (les patients)) si among peers ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((liang yang) OR (wang yang)) dean ((lead patients) OR (les patients)) si among peers ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((liang yang) or (wang yang)) dean ((lead patients) OR (les patients)) si among peers ;*".