Perhaps you should try some spelling variations:
among doctors » among donors, money doctors, among indicators
les patients » older patients, aids patients, aims patients
des patients » des patents, des patienten, older patients
among actors » among acholi, among donors
wang liang » wang yang
liang yang » liang ying, wang yang, huang yang
yang yang » wang yang, wang yan

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 yang ((des patients) OR (les patients)) 1.8 ((among actors) or (among doctors)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang yang yang ((des patients) OR (les patients)) 1.8 ((among actors) OR (among doctors)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang liang yang yang ((des patients) OR (les patients)) 1.8 ((among actors) or (among doctors)) ;*".