Perhaps you should try some spelling variations:
doing sin » dong sin, doing un, doing von
yang yang » wang yang, wang yan
wang yong » wang yang, wang hyoung, wang yan
hua test » a test
test kaw » test a, test kit, test awt
thi hong » tan hong
hong ghi » zhong zhi, hong g, hong hai

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: ((doing sin) OR (((yang yang) OR (wang yong)))) ya hua test kaw thi hong ghi ;~.
• Adding a wildcard symbol may retrieve word variants: ((doing sin) or (((yang yang) or (wang yong)))) ya hua test kaw thi hong ghi ;*.