Perhaps you should try some spelling variations:
class dann » class demand
one class » one case
dong jung » hong jong, dong ping, dong yang
dann bin » dong bin
bin chen » yi chen, li chen, don chen
yang jin » yang jie, yang jun, ying jin
yang yue » wang yue, yang yun, yang jui

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: one class dann bin chen ((((yang jin) OR (dong jung))) OR (yang judy)) ((yang yue) OR (yang di)) ;~.
• Adding a wildcard symbol may retrieve word variants: one class dann bin chen ((((yang jin) or (dong jung))) or (yang judy)) ((yang yue) or (yang di)) ;*.