Perhaps you should try some spelling variations:
wang daoping » wang xiaoping, wang danning, wang xiaobing
daoping yang » dong yang
amin jeong » min jeong, amin hong
jeong yeon » jeong hyeok, jeang yean, seung yeon
test kaw » test a, test kit, test awt
yang xi » yang di, yang yi, yang jui

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang daoping yang xi ((test kaw) or (test (kits or kit))) amin jeong yeon ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang daoping yang xi ((test kaw) OR (test (kits OR kit))) amin jeong yeon ;*.