Perhaps you should try some spelling variations:
one class » one case
class man » class mail, class mind, class a
yang jin » yang jun, ying jin, shang jin
yan guan » gan guan, yan yuan, yang guang
yang jie » yang di, yang jui, yang xi
man bin » man ein, dann bin, amar bin
yang yi » yang di, yang xi, 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 man bin we ((((yang jin) OR (yan guan))) OR (yang jie)) ((yang judy) OR (yang yi)) ;~.
• Adding a wildcard symbol may retrieve word variants: one class man bin we ((((yang jin) or (yan guan))) or (yang jie)) ((yang judy) or (yang yi)) ;*.