Perhaps you should try some spelling variations:
what changes » what causes, net changes
changes hee » changes due, chang hee, changes how
dang hadi » dang hai
man what » mean what, man hat, men what
hee chen » hua chen, jie chen, lee chee
yang jie » yang jin, yang yi, yang jun
yang jui » yang judy, yang yi
yang xi » yang yi

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: man what changes hee chen ((((((yang jie) OR (yang xi))) OR (yang jui))) OR (yang di)) dang hadi ;~.
• Adding a wildcard symbol may retrieve word variants: man what changes hee chen ((((((yang jie) or (yang xi))) or (yang jui))) or (yang di)) dang hadi ;*.