Perhaps you should try some spelling variations:
changes caused » change cause, changes cases, changes used
ii changes » iii changes, 2 changes, 3 changes
caused how » caused him, used how, captured how
quan guan » gan guan, quan guo, yan guan
yang yang » wang yang, wang yan
know your » grow your
yan yuan » yan guan, fang yuan, nan yan
how know » now known, you know, do 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: wing ((((yan yuan) OR (yang yang))) OR (quan guan)) ii changes caused how know your ;~.
• Adding a wildcard symbol may retrieve word variants: wing ((((yan yuan) or (yang yang))) or (quan guan)) ii changes caused how know your ;*.