Perhaps you should try some spelling variations:
seung yeon » seung joon, seung won
seung youn » seung joon, seung won
jeong yeon » jeong hyeok, jeang yean, jeong dahyeon
yan yang » yang yang, yao yang, dan yang
wan yan » wang yan, nan yan, wai yan
yang yi » yang di, yang xi, yang jui
test 4 » test _

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan yang yi ((test auf) OR (test 4)) min ((((seung yeon) OR (seung youn))) OR (jeong yeon)) ;~".
• Adding a wildcard symbol may retrieve word variants: wan yan yang yi ((test auf) OR (test 4)) min ((((seung yeon) OR (seung youn))) OR (jeong yeon)) ;*.