Perhaps you should try some spelling variations:
change making » change using
change ming » change mowing, change timing, change using
yan liang » yang liang, wang liang, you liang
yuan wang » yan wang, yuan kang, yuan chang
know when » know what, know them, know who
can know » can't know, a know

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: ((yan liang) OR (yuan wang)) can know when ((change ming) OR (change making)) hong seo ;~.
• Adding a wildcard symbol may retrieve word variants: ((yan liang) or (yuan wang)) can know when ((change ming) or (change making)) hong seo ;*.