Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung joon, seung won
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang
min seung » min jeong
test 5uf » test auf, test 5.2, test 5.3
yang yi » yang di, yang xi, yang jui
test 5 » test _, test 4

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: wang yong yang yi ((test 5uf) OR (test 5)) min seung yeon ;~.
• Adding a wildcard symbol may retrieve word variants: wang yong yang yi ((test 5uf) or (test 5)) min seung yeon ;*.