Perhaps you should try some spelling variations:
des prasidenten » des patienten
prasidenten von » prasidenten der
among actors » among doctors, among acholi, among donors
von among » even among
wing yan » wang yan, wing ian, wing tan
yang jin » yang jie, yang jun, ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: wing yan ((yang jin) or (zhang fan)) des prasidenten von among actors ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing yan ((yang jin) OR (zhang fan)) des prasidenten von among actors ;*.