Perhaps you should try some spelling variations:
greatest challenges » greatest challenge, treatment challenges, related challenges
challenges funing » challenges finding, challenges facing, challenges during
funing zhong » funding among
zhong zhi » zhang zhi, hong ghi, zhong tai
yang jui » yang judy, yang di, yang xi
wan yan » wang yan, nan yan, wai yan
ya 3 » a 3, 2a 3, 5a 3
4a 3 » a 3, 4 3, 44 3

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan yan) OR (yang jui))ng ((ya 3) OR (4a 3)) greatest challenges funing zhong zhi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) or (yang jui))ng ((ya 3) OR (4a 3)) greatest challenges funing zhong zhi ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (yang jui))ng ((ya 3) OR (4a 3)) greatest challenges funing zhong zhi ;*.