Perhaps you should try some spelling variations:
seung yeon » jeong yeon, seung won, seung youn
seung joon » kyung joon, seung won, seung youn
wang ying » wang yang, wang jing, wang ning
wang yong » wang yang, wang hyoung, wang yan
yang xi » yang di, yang yi, yang jui
xi test » ai test, i test, ii test
test 5 » test _, test 4
5 min » 5 main, 15 min, _ min

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